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122.24=7.8v+0.56
We move all terms to the left:
122.24-(7.8v+0.56)=0
We get rid of parentheses
-7.8v-0.56+122.24=0
We add all the numbers together, and all the variables
-7.8v+121.68=0
We move all terms containing v to the left, all other terms to the right
-7.8v=-121.68
v=-121.68/-7.8
v=15+2.78571428571/4.64285714286
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