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30-6(2x+1)=12
We move all terms to the left:
30-6(2x+1)-(12)=0
We add all the numbers together, and all the variables
-6(2x+1)+18=0
We multiply parentheses
-12x-6+18=0
We add all the numbers together, and all the variables
-12x+12=0
We move all terms containing x to the left, all other terms to the right
-12x=-12
x=-12/-12
x=1
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