2x+6=-x+-15

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Solution for 2x+6=-x+-15 equation: 



2x+6=-x+-15

We move all terms to the left:

2x+6-(-x+-15)=0

We add all the numbers together, and all the variables

2x-(-1x-15)+6=0

We get rid of parentheses

2x+1x+15+6=0

We add all the numbers together, and all the variables

3x+21=0

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

3x=-21

x=-21/3

x=-7

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