42=-7/2v

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Solution for 42=-7/2v equation: 


v in (-oo:+oo)

42 = (-7/2)*v // - (-7/2)*v

42-((-7/2)*v) = 0

(7/2)*v+42 = 0

7/2*v+42 = 0 // - 42

7/2*v = -42 // : 7/2

v = -42/7/2

v = -12

v = -12

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