4x-13=8+x

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



4x-13=8+x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

4x-x-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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