30=3x+90

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Solution for 30=3x+90 equation: 



30=3x+90

We move all terms to the left:

30-(3x+90)=0

We get rid of parentheses

-3x-90+30=0

We add all the numbers together, and all the variables

-3x-60=0

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

-3x=60

x=60/-3

x=-20

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