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4x - 7 = 2x + 5 2x - 7 = 5 2x = 12 x = 6.
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7x2 -4x -5x2 +2x = 2x2 -2x
4x+2y-8=0 2y=8-4x y=4-2x slope= -2
2x + 2 = 4x -1 2x = 3 x = 1.5
2x-3=4x+9 -2x-12=0 2x=-12 x=-6
-2x = -4x + 24 -2x + 4x = 24 2x = 24 x = 24/2 x = 12