220=40+30x

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Solution for 220=40+30x equation: 



220=40+30x

We move all terms to the left:

220-(40+30x)=0

We add all the numbers together, and all the variables

-(30x+40)+220=0

We get rid of parentheses

-30x-40+220=0

We add all the numbers together, and all the variables

-30x+180=0

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

-30x=-180

x=-180/-30

x=+6

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