x=15+3x

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Solution for x=15+3x equation: 



x=15+3x

We move all terms to the left:

x-(15+3x)=0

We add all the numbers together, and all the variables

x-(3x+15)=0

We get rid of parentheses

x-3x-15=0

We add all the numbers together, and all the variables

-2x-15=0

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

-2x=15

x=15/-2

x=-7+1/2

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