3v-7v=40

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Solution for 3v-7v=40 equation: 



3v-7v=40

We move all terms to the left:

3v-7v-(40)=0

We add all the numbers together, and all the variables

-4v-40=0

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

-4v=40

v=40/-4

v=-10

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