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18v-20=-2(-9v+10)
We move all terms to the left:
18v-20-(-2(-9v+10))=0
We calculate terms in parentheses: -(-2(-9v+10)), so:We get rid of parentheses
-2(-9v+10)
We multiply parentheses
18v-20
Back to the equation:
-(18v-20)
18v-18v+20-20=0
We add all the numbers together, and all the variables
=0
v=0/1
v=0
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