1.-3y+7=-4y+5
-3y+4y=5-7
y=-2
2.二分之一=三分之一＋2x
1/2-1/3=2x
2x=1/6
x=1/125x-1.4=4x＋五分之三过程！5x-1.4=4x＋五分之三5x-4x=0.6+1.4x=21.3(x+6)-7=-2(x-5)2.2(3y-1)=5(1＋2y)＋4y 过程，初中方程！！！谢谢给你加分1.3(x+6)-7=-2(x-5)3x+18-7=-2x+103x+2x=10-18+75x=-1x=-1/52.2(3y-1)=5(1＋2y)＋4y6y-2=5+10y+4y6y-10y-4y=5+2-8y=7y=-7/8