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100=10(2x-12)
We move all terms to the left:
100-(10(2x-12))=0
We calculate terms in parentheses: -(10(2x-12)), so:We get rid of parentheses
10(2x-12)
We multiply parentheses
20x-120
Back to the equation:
-(20x-120)
-20x+120+100=0
We add all the numbers together, and all the variables
-20x+220=0
We move all terms containing x to the left, all other terms to the right
-20x=-220
x=-220/-20
x=+11
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