来自李青湘的问题
初一不等式方程组{a=2b+3{x-y=13{x-y=4{5x-y=110{a=3b+20{x=6y-7{4x+2y=-1{9y-x=110
初一不等式方程组
{a=2b+3{x-y=13{x-y=4{5x-y=110
{a=3b+20{x=6y-7{4x+2y=-1{9y-x=110
1回答
2020-06-12 01:20
初一不等式方程组{a=2b+3{x-y=13{x-y=4{5x-y=110{a=3b+20{x=6y-7{4x+2y=-1{9y-x=110
初一不等式方程组
{a=2b+3{x-y=13{x-y=4{5x-y=110
{a=3b+20{x=6y-7{4x+2y=-1{9y-x=110
{a=2b+3把a=2b+3代入a=3b+20
{a=3b+202b+3=3b+20
2b-3b=20-3
-b=17
b=-17
把b=-17代入a=2b+3
a=2*(-17)+3
a=-34+3
a=-31