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-19=-4+5v
We move all terms to the left:
-19-(-4+5v)=0
We add all the numbers together, and all the variables
-(5v-4)-19=0
We get rid of parentheses
-5v+4-19=0
We add all the numbers together, and all the variables
-5v-15=0
We move all terms containing v to the left, all other terms to the right
-5v=15
v=15/-5
v=-3
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