1】20-25%x=15.5x 【2】4x+2(8-x )=26
问题描述:
1】20-25%x=15.5x 【2】4x+2(8-x )=26
答
20-25%x=15.5x
-25%x-15.5x=- 20
-15.75x=-20
x=80/63
4x+2(8-x)=26
解:4x+16-2x=26
4x-2x=26-16
2x=10
x=5