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-7.89+3.8v=3.21+9.9v-4.6v
We move all terms to the left:
-7.89+3.8v-(3.21+9.9v-4.6v)=0
We add all the numbers together, and all the variables
3.8v-(5.3v+3.21)-7.89=0
We get rid of parentheses
3.8v-5.3v-3.21-7.89=0
We add all the numbers together, and all the variables
-1.5v-11.1=0
We move all terms containing v to the left, all other terms to the right
-1.5v=11.1
v=11.1/-1.5
v=-7+0.6/1.5
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