用代入法解方程组:{y=2x-3,3x+2y=8 {2x-y=5,3x+4y=2
用代入法解方程组:y=3(x-y),x=2(x-y)
{2x+5y=-2,x=8-3y用代入法解方程组
用代入法解方程组4x-3y=10,2x-y=8
用代入法解方程组:2x+3y=-1 4x-y=5
用代入法解方程组 {x-y=3 2y+3(x-y)=11}
用代入法解方程组:{y=2x-3,3x+2y=8 {2x-y=5,3x+4y=2
{3x+2y=8,x-2y=0用代入法解方程组
用代入法解方程组3x+2y=4x+3y=1
用代入法解方程组5x+3y=36,-x+9y=2
用代入法解下列方程组 3x=4y x-2y=-5
用代入法解此方程组:(x+y)/2+(x-y)/3=6 4(x+y)-5(x-y)=2
2x=5(x+y) 3x-10(x+y)=2 用代入法解此方程组