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13=2(x-3)-3
We move all terms to the left:
13-(2(x-3)-3)=0
We calculate terms in parentheses: -(2(x-3)-3), so:We get rid of parentheses
2(x-3)-3
We multiply parentheses
2x-6-3
We add all the numbers together, and all the variables
2x-9
Back to the equation:
-(2x-9)
-2x+9+13=0
We add all the numbers together, and all the variables
-2x+22=0
We move all terms containing x to the left, all other terms to the right
-2x=-22
x=-22/-2
x=+11
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