-13=-7x+4x+8

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Solution for -13=-7x+4x+8 equation: 



-13=-7x+4x+8

We move all terms to the left:

-13-(-7x+4x+8)=0

We add all the numbers together, and all the variables

-(-3x+8)-13=0

We get rid of parentheses

3x-8-13=0

We add all the numbers together, and all the variables

3x-21=0

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

3x=21

x=21/3

x=7

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