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81=-3(8x+5)
We move all terms to the left:
81-(-3(8x+5))=0
We calculate terms in parentheses: -(-3(8x+5)), so:We get rid of parentheses
-3(8x+5)
We multiply parentheses
-24x-15
Back to the equation:
-(-24x-15)
24x+15+81=0
We add all the numbers together, and all the variables
24x+96=0
We move all terms containing x to the left, all other terms to the right
24x=-96
x=-96/24
x=-4
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