15=7-5x-3x

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Solution for 15=7-5x-3x equation: 



15=7-5x-3x

We move all terms to the left:

15-(7-5x-3x)=0

We add all the numbers together, and all the variables

-(-8x+7)+15=0

We get rid of parentheses

8x-7+15=0

We add all the numbers together, and all the variables

8x+8=0

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

8x=-8

x=-8/8

x=-1

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