x+3.5x=90怎么算?

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x+3.5x=90怎么算?x+3.5x=90怎么算?x+3.5x=90怎么算?(1+3.5)x=904.5x=90x=90÷4.5x=20x+3.5x=904.5x=90x=90×4.5=20x+3.

x+3.5x=90怎么算?
x+3.5x=90怎么算?

x+3.5x=90怎么算?
(1+3.5)x=90
4.5x=90
x=90÷4.5
x=20

x+3.5x=90
4.5x=90
x=90×4.5
=20

x+3.5x=90
4.5x=90
x=90/4.5
x=20

4.5x=90
x=90/4.5
x=20