7x+5x-15=57

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Solution for 7x+5x-15=57 equation: 



7x+5x-15=57

We move all terms to the left:

7x+5x-15-(57)=0

We add all the numbers together, and all the variables

12x-72=0

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

12x=72

x=72/12

x=6

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