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210=7(-6-6v)
We move all terms to the left:
210-(7(-6-6v))=0
We add all the numbers together, and all the variables
-(7(-6v-6))+210=0
We calculate terms in parentheses: -(7(-6v-6)), so:We get rid of parentheses
7(-6v-6)
We multiply parentheses
-42v-42
Back to the equation:
-(-42v-42)
42v+42+210=0
We add all the numbers together, and all the variables
42v+252=0
We move all terms containing v to the left, all other terms to the right
42v=-252
v=-252/42
v=-6
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