7x+13=77-x

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



7x+13=77-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

7x+1x-77+13=0

We add all the numbers together, and all the variables

8x-64=0

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

8x=64

x=64/8

x=8

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