方程组3X+3Y+2X-2Y=36 4X+4Y-5X+5Y=2 怎么化简啊!紧急!1

3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组 解方程组3x+5(x+y)=2 3y-2(x+y)=4 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 方程组4x+y=3 3x+2y=5,则x-y= 解方程组x+y/3=x-y/4 2x+3y=11 解方程组,x+y/2=3x-2y=10+6x+y/4, 方程组x-2y=8,3x-4y=5,x=?,y=? 解方程组 y=2x x+y=3 解二元一次方程组：3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1 2(x+y)-3(x-y)+=3 4(x+y)+3x=15+3y 换元法解方程组 2元一次方程组 2/x+y+3/x-y=6 4(x+y)-3(x-y)=-20 解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3（x-y）=15 解方程组 4(x+y)-(2x-y)=14 ,3(x+y)-2(2x-y)=8 解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组;x+y/2=x-y/3=6 4(x+y)-3(x-y)=-20 解方程组⑴(x+y)/2-(x-y)/3=6,⑵3(x+y)=4(x-y) 解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3