7x-12=3x+28=120

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Solution for 7x-12=3x+28=120 equation: 



7x-12=3x+28=120

We move all terms to the left:

7x-12-(3x+28)=0

We get rid of parentheses

7x-3x-28-12=0

We add all the numbers together, and all the variables

4x-40=0

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

4x=40

x=40/4

x=10

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