-7u+13=-u-77

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Solution for -7u+13=-u-77 equation: 



-7u+13=-u-77

We move all terms to the left:

-7u+13-(-u-77)=0

We add all the numbers together, and all the variables

-7u-(-1u-77)+13=0

We get rid of parentheses

-7u+1u+77+13=0

We add all the numbers together, and all the variables

-6u+90=0

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

-6u=-90

u=-90/-6

u=+15

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