18+7x=42-x

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Solution for 18+7x=42-x equation: 



18+7x=42-x

We move all terms to the left:

18+7x-(42-x)=0

We add all the numbers together, and all the variables

7x-(-1x+42)+18=0

We get rid of parentheses

7x+1x-42+18=0

We add all the numbers together, and all the variables

8x-24=0

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

8x=24

x=24/8

x=3

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