请用代入法解: {y+1=2(x+2) 2x-3y=1 {y=1-x 5x+2y=8 请利用整体代入法解: {(x-3)
请用代入法解: {y+1=2(x+2) 2x-3y=1 {y=1-x 5x+2y=8 请利用整体代入法解: {(x-3)/2-3y=0 2(x-3)-
请用代入法解:
{y+1=2(x+2) 2x-3y=1
{y=1-x 5x+2y=8
请利用整体代入法解:
{(x-3)/2-3y=0 2(x-3)-11=2y
解二元一次方程组:
{5x-6y=11 8x-9y=13
{(y+1)/4=(x+2)/3 2x-3y=1