15+8=-x

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Solution for 15+8=-x equation: 



15+8=-x

We move all terms to the left:

15+8-(-x)=0

We add all the numbers together, and all the variables

-(-1x)+15+8=0

We add all the numbers together, and all the variables

-(-1x)+23=0

We get rid of parentheses

1x+23=0

We add all the numbers together, and all the variables

x+23=0

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

x=-23

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