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So apparently when simplified this 9q-4-(2q+1) is supposed to equal 7q+3. I don't know how that works does anyone know how to get there?

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The negative sign in front of the parentheses changes the signs of the items inside the parentheses. The 2q becomes -2q and the +1 becomes -1. That means that the negative sign in front of the parentheses tells you to take the "opposite" of everything inside the parentheses.

Your statement should now read 9q-4-2q-1. Combining like terms means that 9q-2q becomes 7q and -4-1 becomes -5. Your answer should be 7q-5.

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Thanks and I thought that was it but my maths teacher said it was 7q+3 but I don't know how he got there
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well(2q+1=3) but.... i dont know the rest sry

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Collect like terms. 9q-2q= 7q but I think it should be 7q-5

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I thought it was supposed to be that be the answer says +3 and it doesn't explain how to get there
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9q-4-(2q+1), first you need to open the brackets, by multiplying the values by the negative sign before the brackets to get 9q-4-2q-1. Then, collect the like terms together, 9q ? 2q ? 4 - 1. The answer will be 7q-5.

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I thought so too but the answer that my maths teacher gave was 7q+3 and I don't understand how he got there
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9q-4-(2q+1)
=9q-4-2q-1
=7q-5

or 9q+4-(2q+1)
=9q+4-2q-1
=7q+3

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That makes sense and is very helpful but its definitley a minus sign
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If you're cking answers in the back of a book, they are often wrong! That -4 needs to be pos. to get that answer.

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It was the Maths teacher that told us the answer and I don't know why but I didn't here when he told us how
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