Can someone help me simplify this problem step by step and explain how you do it, I need to study this.

3y - (4x + 7) -y+11+ (2x-y+12)

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- November 8th 2006, 11:07 PM #1

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- November 8th 2006, 11:46 PM #2

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In this case you expand the brackets all the brackets (noting that -(4x+7) is

-4x - 7):

3y - 4x - 7 -y+11+ 2x - y + 12

collect together all the terms with the same unknown:

(3y - y - y) + (-4x + 2x) - 7 +11 +12

tot up how many of each variable you have:

(1y) + (-2x) + 16

remove brackets:

y - 2x +16

RonL