4x+8x-42=138

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Solution for 4x+8x-42=138 equation: 



4x+8x-42=138

We move all terms to the left:

4x+8x-42-(138)=0

We add all the numbers together, and all the variables

12x-180=0

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

12x=180

x=180/12

x=15

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