8v+15=78-v

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Solution for 8v+15=78-v equation: 



8v+15=78-v

We move all terms to the left:

8v+15-(78-v)=0

We add all the numbers together, and all the variables

8v-(-1v+78)+15=0

We get rid of parentheses

8v+1v-78+15=0

We add all the numbers together, and all the variables

9v-63=0

We move all terms containing v to the left, all other terms to the right

9v=63

v=63/9

v=7

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