15=13+4x

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Solution for 15=13+4x equation: 



15=13+4x

We move all terms to the left:

15-(13+4x)=0

We add all the numbers together, and all the variables

-(4x+13)+15=0

We get rid of parentheses

-4x-13+15=0

We add all the numbers together, and all the variables

-4x+2=0

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

-4x=-2

x=-2/-4

x=1/2

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