-7x-13=-90

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Solution for -7x-13=-90 equation: 



-7x-13=-90

We move all terms to the left:

-7x-13-(-90)=0

We add all the numbers together, and all the variables

-7x+77=0

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

-7x=-77

x=-77/-7

x=+11

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