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Anonymous
the answer is 9x-29y. if you need help with any kind of math visit www.AAAmath.com
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7x - 9x = -2x
2x+3=9x 3=9x-2x 3=7x x=3/7
5x+2x=7x2x + 5x = 7x
3x-2y+9+9y-x = 2x+7y+9
7x-5x=8 2x=8 x=4