7=x-30

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Solution for 7=x-30 equation: 



7=x-30

We move all terms to the left:

7-(x-30)=0

We get rid of parentheses

-x+30+7=0

We add all the numbers together, and all the variables

-1x+37=0

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

-x=-37

x=-37/-1

x=+37

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