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12+8=-2(5x-10)
We move all terms to the left:
12+8-(-2(5x-10))=0
We add all the numbers together, and all the variables
-(-2(5x-10))+20=0
We calculate terms in parentheses: -(-2(5x-10)), so:We get rid of parentheses
-2(5x-10)
We multiply parentheses
-10x+20
Back to the equation:
-(-10x+20)
10x-20+20=0
We add all the numbers together, and all the variables
10x=0
x=0/10
x=0
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