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84=4(6x+3)
We move all terms to the left:
84-(4(6x+3))=0
We calculate terms in parentheses: -(4(6x+3)), so:We get rid of parentheses
4(6x+3)
We multiply parentheses
24x+12
Back to the equation:
-(24x+12)
-24x-12+84=0
We add all the numbers together, and all the variables
-24x+72=0
We move all terms containing x to the left, all other terms to the right
-24x=-72
x=-72/-24
x=+3
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