1.(X+Y)/2【原本应是二分之X+Y的但我不会打分号】+(X-Y)/3=6

问题描述:

1.(X+Y)/2【原本应是二分之X+Y的但我不会打分号】+(X-Y)/3=6
4(x+y)-5(x-y)=2
2.X+2Y=1
2X-3Y=2

(X+Y)/2【原本应是二分之X+Y的但我不会打分号】+(X-Y)/3=6整理得:3(x+y)+2(x-y)=36;3x+3y+2x-2y=36;5x+y=36(1)4(x+y)-5(x-y)=24x+4y-5x+5y=2;-x+9y=2(2)(1)+(2)×5得:y+45y=36+10;46y=46;y=1;带入(1)得...