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-243=-90-3v
We move all terms to the left:
-243-(-90-3v)=0
We add all the numbers together, and all the variables
-(-3v-90)-243=0
We get rid of parentheses
3v+90-243=0
We add all the numbers together, and all the variables
3v-153=0
We move all terms containing v to the left, all other terms to the right
3v=153
v=153/3
v=51
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