15-x=x+3

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Solution for 15-x=x+3 equation: 



15-x=x+3

We move all terms to the left:

15-x-(x+3)=0

We add all the numbers together, and all the variables

-1x-(x+3)+15=0

We get rid of parentheses

-1x-x-3+15=0

We add all the numbers together, and all the variables

-2x+12=0

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

-2x=-12

x=-12/-2

x=+6

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