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v+2.8-1.5v=2.5
We move all terms to the left:
v+2.8-1.5v-(2.5)=0
We add all the numbers together, and all the variables
-0.5v+0.3=0
We move all terms containing v to the left, all other terms to the right
-0.5v=-0.3
v=-0.3/-0.5
v=0.3/0.5
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