Posted by kiki on Sunday, October 3, 2010 at 1:32pm.
simplified it will be 7x - (-3x) + 8
so 7x - (-3x) = 10+8 = 18
Answer is 18
-2X+9X - (-5x-2X+8)
Can I will assume that your X and x are the same? Then ...
= -2x - 9x + 5x + 2x - 8
= -4x - 8
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