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189=143-v
We move all terms to the left:
189-(143-v)=0
We add all the numbers together, and all the variables
-(-1v+143)+189=0
We get rid of parentheses
1v-143+189=0
We add all the numbers together, and all the variables
v+46=0
We move all terms containing v to the left, all other terms to the right
v=-46
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