30-7=x+20

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Solution for 30-7=x+20 equation: 



30-7=x+20

We move all terms to the left:

30-7-(x+20)=0

We add all the numbers together, and all the variables

-(x+20)+23=0

We get rid of parentheses

-x-20+23=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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