3=-x+15

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Solution for 3=-x+15 equation: 



3=-x+15

We move all terms to the left:

3-(-x+15)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

1x-15+3=0

We add all the numbers together, and all the variables

x-12=0

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

x=12

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