5u+15=2u+90

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Solution for 5u+15=2u+90 equation: 



5u+15=2u+90

We move all terms to the left:

5u+15-(2u+90)=0

We get rid of parentheses

5u-2u-90+15=0

We add all the numbers together, and all the variables

3u-75=0

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

3u=75

u=75/3

u=25

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