解方程组 3(X+Y)-5(X-Y)=16…………① 2(x+y)-(X-Y)=15…………②

解方程组:{x+y=3,x-y=5 解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5) 解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1 3/(X-Y)+10/(X+Y)=-5 2/(X-Y)-15/(X+Y)=1 解分式方程组 解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1} 解二元一次方程组 x+y=3 1/2(x+y)-3y=5 解方程组x+y（y加绝对值）=-1,3x-5y=-11 二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组:x+y=3,5x-3(x+y)=1 解方程组：{3|x|-2y=8 2|x|+5y-1}解方程组：3|x|-2y=8 2|x|+5y-1 1/2x-2y=-74,x-6y=-12解方程组,x／5-y／2=2,2x+3y=4解方程组 解方程组: ｛3x+2y=13 3x-2y=5 ｛x-y/3=x+y/2+1 2x-5y=9 3(x-y)+5(x-y)=19 4(x+y)-2(x-y)=-1解方程组是3（x+y) 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 解方程组:x+y=2x+y+1=5x+2y+1 解关于X,Y的方程组,X+Y=a,5X-3Y=-a, 解方程组：｛4x+5(x-y)=30,4y-3(x-y)=6