12x+42=4x+138

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Solution for 12x+42=4x+138 equation: 



12x+42=4x+138

We move all terms to the left:

12x+42-(4x+138)=0

We get rid of parentheses

12x-4x-138+42=0

We add all the numbers together, and all the variables

8x-96=0

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

8x=96

x=96/8

x=12

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