-20=-5/7v

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Solution for -20=-5/7v equation: 


v in (-oo:+oo)

-20 = (-5/7)*v // - (-5/7)*v

-((-5/7)*v)-20 = 0

(5/7)*v-20 = 0

5/7*v-20 = 0 // + 20

5/7*v = 20 // : 5/7

v = 20/5/7

v = 28

v = 28

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