15+7u=20u+15-13u

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



15+7u=20u+15-13u

We move all terms to the left:

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

We add all the numbers together, and all the variables

7u-(7u+15)+15=0

We get rid of parentheses

7u-7u-15+15=0

We add all the numbers together, and all the variables

=0

u=0/1

u=0

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