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1.3=13.8+-5v
We move all terms to the left:
1.3-(13.8+-5v)=0
We add all the numbers together, and all the variables
-(-5v)+1.3=0
We get rid of parentheses
5v+1.3=0
We move all terms containing v to the left, all other terms to the right
5v=-1.3
v=-1.3/5
v=-1/3.8461538461538
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