13=x-20;7

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Solution for 13=x-20;7 equation: 



13=x-207

We move all terms to the left:

13-(x-207)=0

We get rid of parentheses

-x+207+13=0

We add all the numbers together, and all the variables

-1x+220=0

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

-x=-220

x=-220/-1

x=+220

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