7-3x+7x=15

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



7-3x+7x=15

We move all terms to the left:

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

We add all the numbers together, and all the variables

4x-8=0

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

4x=8

x=8/4

x=2

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