7-9x-15=12x

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Solution for 7-9x-15=12x equation: 



7-9x-15=12x

We move all terms to the left:

7-9x-15-(12x)=0

We add all the numbers together, and all the variables

-21x-8=0

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

-21x=8

x=8/-21

x=-8/21

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