7=x+42

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Solution for 7=x+42 equation: 



7=x+42

We move all terms to the left:

7-(x+42)=0

We get rid of parentheses

-x-42+7=0

We add all the numbers together, and all the variables

-1x-35=0

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

-x=35

x=35/-1

x=-35

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