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2x-20=12(x-20)
We move all terms to the left:
2x-20-(12(x-20))=0
We calculate terms in parentheses: -(12(x-20)), so:We get rid of parentheses
12(x-20)
We multiply parentheses
12x-240
Back to the equation:
-(12x-240)
2x-12x+240-20=0
We add all the numbers together, and all the variables
-10x+220=0
We move all terms containing x to the left, all other terms to the right
-10x=-220
x=-220/-10
x=+22
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