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13=0.5(43-x)
We move all terms to the left:
13-(0.5(43-x))=0
We add all the numbers together, and all the variables
-(0.5(-1x+43))+13=0
We calculate terms in parentheses: -(0.5(-1x+43)), so:We get rid of parentheses
0.5(-1x+43)
We multiply parentheses
-0.5x+21.5
Back to the equation:
-(-0.5x+21.5)
0.5x-21.5+13=0
We add all the numbers together, and all the variables
0.5x-8.5=0
We move all terms containing x to the left, all other terms to the right
0.5x=8.5
x=8.5/0.5
x=17
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