8x-2 = -9+7x
8x-7x = -9+2
x=-7
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-7x + 5 = -9 -7x = -14 7x = 14 x = 2
Subtract 7x from each side: 8 = -9 Not possible, game over.
7x + 9 = 51 7x = 42 x = 42/7 = 6
7x - 9 = 3x + 5 7x - 3x - 9 = 5 7x - 3x = 5 + 9 4x = 14 x = 14/4
x=-7/13