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800=20(6+x)
We move all terms to the left:
800-(20(6+x))=0
We add all the numbers together, and all the variables
-(20(x+6))+800=0
We calculate terms in parentheses: -(20(x+6)), so:We get rid of parentheses
20(x+6)
We multiply parentheses
20x+120
Back to the equation:
-(20x+120)
-20x-120+800=0
We add all the numbers together, and all the variables
-20x+680=0
We move all terms containing x to the left, all other terms to the right
-20x=-680
x=-680/-20
x=+34
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