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8=4+2vv=
We move all terms to the left:
8-(4+2vv)=0
We add all the numbers together, and all the variables
-(2vv+4)+8=0
We get rid of parentheses
-2vv-4+8=0
We add all the numbers together, and all the variables
-2vv+4=0
We move all terms containing v to the left, all other terms to the right
-2vv=-4
v=-4/1
v=-4
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