2x+15=-1x-15

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Solution for 2x+15=-1x-15 equation: 



2x+15=-1x-15

We move all terms to the left:

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

We get rid of parentheses

2x+1x+15+15=0

We add all the numbers together, and all the variables

3x+30=0

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

3x=-30

x=-30/3

x=-10

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