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9=2v+3v=
We move all terms to the left:
9-(2v+3v)=0
We add all the numbers together, and all the variables
-(+5v)+9=0
We get rid of parentheses
-5v+9=0
We move all terms containing v to the left, all other terms to the right
-5v=-9
v=-9/-5
v=1+4/5
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