-80=-2(10+x)

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Solution for -80=-2(10+x) equation:



-80=-2(10+x)
We move all terms to the left:
-80-(-2(10+x))=0
We add all the numbers together, and all the variables
-(-2(x+10))-80=0
We calculate terms in parentheses: -(-2(x+10)), so:
-2(x+10)
We multiply parentheses
-2x-20
Back to the equation:
-(-2x-20)
We get rid of parentheses
2x+20-80=0
We add all the numbers together, and all the variables
2x-60=0
We move all terms containing x to the left, all other terms to the right
2x=60
x=60/2
x=30

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