0.5x-0.7=6.5-1.3x 5x -7=65-13x5x+13x =65+7 18x =72 x=4 -1/3 (1-2x) = 2/7 (3x+1)-7 (1-2x) =6 (3x+1)-7+14 x =18x+6 14x-18x=6+7 - 4x=13...求大神回答我最后一个问题~~~解方程：x-1/3-x+2/6=4-x/2+1x-1/3-x+2/6=4-x/2+1x-1/3-x+2/6=4-x/32x-2-x-2=4-x x-4 =4-x 2x=8x =4