3x = 12, x = 4, -4x = 12, x = -3, -5x = -25, x = 5, 3x = 7, x = 3/7, -11x = 15, x = - 15/11, -8x = - 9, x = 9/8, 2x + 10 = 12, x = 1, x + 7 = 16, x = 9, x + 6 = -3, x = -9, 1 - 2x = 5x + 15, x = -2, 5x - 8 = 9x - 12, x = 1, x = 8 - 2(4 - x), x = 0, (x+5).6 - (x+5).5 = 49, x = 44, x - (x-5) = 132 - (x-3), x = 130, 4.(x-1) = (x+3) - (x+4), x = 3/4.

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