1/4x=-1/2x+3乘以4得 x=-2x+123x=12x=4
1/4x=-1/2x+3x=(-1/2x+3)x4x=-1/2x x 4+3x4x=-2x + 12x + 2x = 123x = 12x = 4
1/4x=-1/2x+3(1/4+1/2)x=33/4x=3x=3*4/3x=4
4