x+x+3=-4x+15

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Solution for x+x+3=-4x+15 equation: 



x+x+3=-4x+15

We move all terms to the left:

x+x+3-(-4x+15)=0

We add all the numbers together, and all the variables

2x-(-4x+15)+3=0

We get rid of parentheses

2x+4x-15+3=0

We add all the numbers together, and all the variables

6x-12=0

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

6x=12

x=12/6

x=2

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