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23+18v=-21+13v
We move all terms to the left:
23+18v-(-21+13v)=0
We add all the numbers together, and all the variables
18v-(13v-21)+23=0
We get rid of parentheses
18v-13v+21+23=0
We add all the numbers together, and all the variables
5v+44=0
We move all terms containing v to the left, all other terms to the right
5v=-44
v=-44/5
v=-8+4/5
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