8x+15=x-6

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Solution for 8x+15=x-6 equation: 



8x+15=x-6

We move all terms to the left:

8x+15-(x-6)=0

We get rid of parentheses

8x-x+6+15=0

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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