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0.7x=0.5(x-12)
We move all terms to the left:
0.7x-(0.5(x-12))=0
We calculate terms in parentheses: -(0.5(x-12)), so:We get rid of parentheses
0.5(x-12)
We multiply parentheses
0.5x-6
Back to the equation:
-(0.5x-6)
0.7x-0.5x+6=0
We add all the numbers together, and all the variables
0.2x+6=0
We move all terms containing x to the left, all other terms to the right
0.2x=-6
x=-6/0.2
x=-30
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