1.4x-120=x-80
问题描述:
1.4x-120=x-80
答
1.4x-120=x-80
1.4X-X=120-80
0.4X=40
X=100
1.4x-120=x-80
1.4x-120=x-80
1.4X-X=120-80
0.4X=40
X=100