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13-25=2(x-1)
We move all terms to the left:
13-25-(2(x-1))=0
We add all the numbers together, and all the variables
-(2(x-1))-12=0
We calculate terms in parentheses: -(2(x-1)), so:We get rid of parentheses
2(x-1)
We multiply parentheses
2x-2
Back to the equation:
-(2x-2)
-2x+2-12=0
We add all the numbers together, and all the variables
-2x-10=0
We move all terms containing x to the left, all other terms to the right
-2x=10
x=10/-2
x=-5
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