15+4u+20=7u-13

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Solution for 15+4u+20=7u-13 equation: 



15+4u+20=7u-13

We move all terms to the left:

15+4u+20-(7u-13)=0

We add all the numbers together, and all the variables

4u-(7u-13)+35=0

We get rid of parentheses

4u-7u+13+35=0

We add all the numbers together, and all the variables

-3u+48=0

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

-3u=-48

u=-48/-3

u=+16

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