(x+30)+7=3x+21

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Solution for (x+30)+7=3x+21 equation: 



(x+30)+7=3x+21

We move all terms to the left:

(x+30)+7-(3x+21)=0

We get rid of parentheses

x-3x+30-21+7=0

We add all the numbers together, and all the variables

-2x+16=0

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

-2x=-16

x=-16/-2

x=+8

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