3x - 2x= 7 qual e a resposta , 7x, 1x, 2x, 3x, 5x, 10x, x # 5x =30 # 6, 6, 7, 9x, 8k, 4, 5, 4x # 5 =x - 16, -5, -8, 7, m, x, y, 7 # x =-2x - 2, -3, 55, 6, 9, 81, 2, x - 7x = -20 # , 7, 1, 3, 6, -9, 12, 3x # 3 = 7 # 2x, 0, x, 12, -8, 4, 2, -x # 1 = x - 7, -5, 1, 14, 8, 4, 12, 4 - x = 8 - 5 x, 4, 6, 8, 0, x, 7, 1 # x = 5 # 2x, -4, -3, 8, 0, x, 13, -5 # 1 = 2x # 7, 6-7, 8, 0, -0, x , 12.

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