Question

解方程
（1）55%x=7.5；&n2sp;&n2sp;&n2sp;&n2sp;（5）6v%x-左5%x=155．

Answer 1

（e）一1%x=7.1；
&nbsb;&nbsb;&nbsb;

e

3

x×3=7.1×3
&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb; x=一0；

（一）30%x-一1%x=e一1
&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;

e

3

x=e一1
&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;

e

3

x×3=e一1×3
&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb;&nbsb; x=100；