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3x+4 = 2x-3 3x-2x = -3-4 x = -7
172=x
3x + 4 = 5x - 6 -3x -3x 4 = 2x - 6 +6 +6 10 = 2x 5 = x
y=16 x= -4
x = 4 and y = 0