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(3x+30)=12x
We move all terms to the left:
(3x+30)-(12x)=0
We add all the numbers together, and all the variables
-12x+(3x+30)=0
We get rid of parentheses
-12x+3x+30=0
We add all the numbers together, and all the variables
-9x+30=0
We move all terms containing x to the left, all other terms to the right
-9x=-30
x=-30/-9
x=3+1/3
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