10(x+9)=120怎么算?
问题描述:
10(x+9)=120怎么算?
答
10(x+9)=120
x+9=12
x=12-9
x=3
10(x+9)=120怎么算?
10(x+9)=120
x+9=12
x=12-9
x=3