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lovelexislots
lovelexislots: 1 year ago

How do you solve this.? I need a genius!!

yes it is homework but Im super confused and I forgot my math book at school so I can't look it up. thanks! 2y-6=3x or y=3x+4

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marshallr0ss
marshallr0ss: 1 year ago

2y - 6 = 3x and y = 3x + 4. Since y = 3x + 4, substitute (3x + 4) into the first problem in place of y.
This gives you 2(3x + 4) - 6 = 3x --> 6x + 8 - 6 = 3x --> 6x + 2 = 3x. Then get all the Xs on one side. 2 = 3x - 6x --> 2 = -3x. Divide each side by -3 to find out what x equals. x= -2/3. now you can find y. y=3x+4 --> y=(3 * -2/3) +4 --> y= -2 + 4 --> y= 2

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shaquille007
shaquille007: 1 year ago

My?

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lovelexislots: 1 year ago
Yeees.. I have a math book..?
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brisn6943
brisn6943: 1 year ago

What are you lookin for

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lovelexislots: 1 year ago
Not really sure. She just gave me this problem to do.
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peterpann: 1 year ago
What if that's the answer
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hockeychic
hockeychic: 1 year ago via iPhone

Solve for x in one of the equations then plug the answer into x in the other equation and solve for y

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lovelexislots: 1 year ago
Alrighty ! I'll try it thanks!!
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softballtwinsforever
softballtwinsforever: 1 year ago

Are u looking for the simplified answer of the multiplied one

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lovelexislots: 1 year ago
Yeah. Think so. Pretty sure. Yes:)
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softballtwinsforever: 1 year ago
Which one??
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softballtwinsforever: 1 year ago
Sorry I meant wait never mind
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me1515
me1515: 1 year ago via iPhone

This is confusing I doin math hw now I'll try it :)

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lovelexislots: 1 year ago
Okay:)
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me1515: 1 year ago via iPhone
Sorry I didn't get it :( I'm only in alge 1 I think
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lovelexislots: 1 year ago
That's okay! Thanks for trying:)
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firecracker88
firecracker88: 1 year ago

Are you solving for x or y just isolating the variable and then simplifying as mush as possible?

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lovelexislots: 1 year ago
Yup!!
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firecracker88: 1 year ago
then you would work in reverse order of PEMDAS adding and subtracting to Isolate the variable. For example that 1st problem you would add six to each side to cancel out adding the six.
so 2y=3x+6
then divide both sides by two so y=(3x+6)/2
then simplify the right using the distributive property so it would be y=1.5x+3
hope that helps
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scaredasall
scaredasall: 1 year ago

Are you solving a system of equations?
If you are, then do what hockeychic said.

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lovelexislots: 1 year ago
Alrighty. Thanks!
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rtiffany60
rtiffany60: 1 year ago via iPhone

Are you solving for y? Are these two different problems or one?

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lovelexislots: 1 year ago
Yeah there 2 different ones
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rtiffany60: 1 year ago via iPhone
If you take the second equation and plug into the first equation for y, you get x=-2/3. Then if you plug -2/3 in for x into the equation you get y=2. X=-2/3 and y=2. That's if the problem is suppose to be done that way.
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bru70
bru70: 1 year ago via iPhone

2y-6=3x 1) y=mx + b basic form y intercept. If in y intercept form start graph at b then do m=slope.

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lovelexislots: 1 year ago
Okay! Thank you!:)
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bru70: 1 year ago via iPhone
How come no thumbs up for me hmmm?
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lovelexislots: 1 year ago
There are..
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jesusfreak97
jesusfreak97: 1 year ago

Plug in 3x+4 for Y in the equation on the left then solve for x

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lovelexislots: 1 year ago
Okkkay!
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NikhilS
NikhilS: 1 year ago via iPhone

X=2/3

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lovelexislots: 1 year ago
Okay.. Thanks! I'll solve it and see if I get that!:)
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peterpann
peterpann: 1 year ago

Find what y and x stands for

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JarrodRodgers
JarrodRodgers: 1 year ago

you need to know if you are solving for x or y then follow your pemdas rules

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john_19950
john_19950: 1 year ago

2y-6=3x ------------ eq. 1
y=3x+4 multiply each side by 2. 2y=6x+8 - --------- eq. 2

subtract equation 1 from equation 2

2y=6x+8
2y-6=3x
--------------------
6 = 3x + 8
3x = 6 -8 = -2
divide each side by 3
x = -2/3

substitute x = -2/3 in y=3x+4
y = 3 * -2/3 + 4
y = -2 +4 = 2

(x, y) = (-2/3 , 2)

get free math homework help at http://www.mathskey.com/cms/index.php?option=com_fireboard&Itemid=45

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