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-5v+4=-7v
We move all terms to the left:
-5v+4-(-7v)=0
We get rid of parentheses
-5v+7v+4=0
We add all the numbers together, and all the variables
2v+4=0
We move all terms containing v to the left, all other terms to the right
2v=-4
v=-4/2
v=-2
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