v+-5v+7v=-12

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Solution for v+-5v+7v=-12 equation: 



v+-5v+7v=-12

We move all terms to the left:

v+-5v+7v-(-12)=0

We add all the numbers together, and all the variables

3v+12=0

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

3v=-12

v=-12/3

v=-4

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