15+x=-9x

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Solution for 15+x=-9x equation: 



15+x=-9x

We move all terms to the left:

15+x-(-9x)=0

We get rid of parentheses

x+9x+15=0

We add all the numbers together, and all the variables

10x+15=0

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

10x=-15

x=-15/10

x=-1+1/2

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