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12+28=-5(4x-8)
We move all terms to the left:
12+28-(-5(4x-8))=0
We add all the numbers together, and all the variables
-(-5(4x-8))+40=0
We calculate terms in parentheses: -(-5(4x-8)), so:We get rid of parentheses
-5(4x-8)
We multiply parentheses
-20x+40
Back to the equation:
-(-20x+40)
20x-40+40=0
We add all the numbers together, and all the variables
20x=0
x=0/20
x=0
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