x+3.5x=90怎么算?
问题描述:
x+3.5x=90怎么算?
答
4.5x=90
x=90/4.5
x=20
答
x+3.5x=90
4.5x=90
x=90/4.5
x=20
答
(1+3.5)x=90
4.5x=90
x=90÷4.5
x=20
答
x+3.5x=90
4.5x=90
x=90×4.5
=20