7u-90=2u+30

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Solution for 7u-90=2u+30 equation: 



7u-90=2u+30

We move all terms to the left:

7u-90-(2u+30)=0

We get rid of parentheses

7u-2u-30-90=0

We add all the numbers together, and all the variables

5u-120=0

We move all terms containing u to the left, all other terms to the right

5u=120

u=120/5

u=24

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