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12=-2(10+x)
We move all terms to the left:
12-(-2(10+x))=0
We add all the numbers together, and all the variables
-(-2(x+10))+12=0
We calculate terms in parentheses: -(-2(x+10)), so:We get rid of parentheses
-2(x+10)
We multiply parentheses
-2x-20
Back to the equation:
-(-2x-20)
2x+20+12=0
We add all the numbers together, and all the variables
2x+32=0
We move all terms containing x to the left, all other terms to the right
2x=-32
x=-32/2
x=-16
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