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9=-(10x-6.6)+6.8
We move all terms to the left:
9-(-(10x-6.6)+6.8)=0
We calculate terms in parentheses: -(-(10x-6.6)+6.8), so:We get rid of parentheses
-(10x-6.6)+6.8
We get rid of parentheses
-10x+6.6+6.8
We add all the numbers together, and all the variables
-10x+13.4
Back to the equation:
-(-10x+13.4)
10x-13.4+9=0
We add all the numbers together, and all the variables
10x-4.4=0
We move all terms containing x to the left, all other terms to the right
10x=4.4
x=4.4/10
x=1.8333333333333/4.1666666666667
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