解方程组:2x+2Y=30,2X+4Y=44

解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组,x+y/2=3x-2y=10+6x+y/4, 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/3=x-y/4 2x+3y=11 解方程组 y=2x x+y=3 解方程组x^2-y^2=x+y 4x^2-y^2+2x-y=0过程 解方程组 4(x+y)-(2x-y)=14 ,3(x+y)-2(2x-y)=8 解方程组：x+y=xy=11 (1) x*x*y+x*y*y=30 (2) 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]-5[X-Y]=2 解二元一次方程组{x+y/2+x-y/3=6,4(x+y)-2=5(x-y) 解方程组2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2 解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4 解方程组x+y/2+x-y/2=7,4(x+y)-5(x-y)=2... 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组 解方程组 x+y/5+x-y/2=7 4(x+y)-5(x-y)=2