3+2x=15-x

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Solution for 3+2x=15-x equation: 



3+2x=15-x

We move all terms to the left:

3+2x-(15-x)=0

We add all the numbers together, and all the variables

2x-(-1x+15)+3=0

We get rid of parentheses

2x+1x-15+3=0

We add all the numbers together, and all the variables

3x-12=0

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

3x=12

x=12/3

x=4

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