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what is -3d-5(2d-5)= 6(-3d-10) ? please helpp!!

please helpp i am stuck!!

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To begin this problem, first distribute the numbers in front of the parenthesis by multiplying:

-3d-5(2d-5)= 6(-3d-10)

-3d -10d+25 = -18d -60

-13d +25 = -18d -60

Next we need to get all the terms with d in them to one side of the equation and all the plain numbers to the other. We can do this by adding 18d to both sides and subtracting 25 from both sides:

5d = -35

Next we divide by 5 and get the result:

d= -7

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Looks like you're solving for the variable d. So, you've got to get all the numbers on one side of the equal sign and d on the other.

I'll get you started...

-3d - 5(2d-5) = 6(-3d-10)
Distribute: -3d -10d +25 = -18d - 60
Solve what you can: -3d - 10d = -13d, so 13d + 25 = -18d -60
13d +25 (-25) = -18d -60 (-25)
13d = -18d - 85
13d (+18d) = -18d (+18d) -85
31d = -85
31d/31 = -85/31 = d!

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