如题所述
3(x + 2) - 2(x - 3) = 12
2x + 3(x - 1) = 5(x + 2) - 4
3x - 2(2x - 3) = 4(x + 1) - 5
(x + 1)/2 + (x - 1)/3 = 2
4(x - 2) - 3(2x + 1) = 5(x + 3) - 2x