用代入法解方程组5x-2=y,2x-3y=1时,方法正确?A.2x-3x=1 B.2x-15x+3=1 C.2x-3(5
用代入法解方程组:2x+3y=-1 4x-y=5
用代入法解方程组:y=3(x-y),x=2(x-y)
用代入法解方程组:2x=3y 3x=2y+1
用代入法解方程组 2x+3y=12 x-2y=-1
用代入法解方程组3x+2y=4x+3y=1
2x-3y=-1 4x+3y=-5 用代入消元法解方程组
2x=5(x+y) 3x-10(x+y)=2 用代入法解此方程组
二元一次方程组:用代入法解方程组:y=2x-5;x+3y=-1
用代入法解方程组2x-5y=7 3X+2X=-1
用代入法解下列方程组:y=1-X,3x+2y=-1 5x-2y=1,x=7-3Y
用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8
{2x+5y=-2,x=8-3y用代入法解方程组