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-19=13v-4
We move all terms to the left:
-19-(13v-4)=0
We get rid of parentheses
-13v+4-19=0
We add all the numbers together, and all the variables
-13v-15=0
We move all terms containing v to the left, all other terms to the right
-13v=15
v=15/-13
v=-1+2/13
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