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(12x+20)=4x
We move all terms to the left:
(12x+20)-(4x)=0
We add all the numbers together, and all the variables
-4x+(12x+20)=0
We get rid of parentheses
-4x+12x+20=0
We add all the numbers together, and all the variables
8x+20=0
We move all terms containing x to the left, all other terms to the right
8x=-20
x=-20/8
x=-2+1/2
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