42=7/2y

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Solution for 42=7/2y equation: 


y in (-oo:+oo)

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

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

(-7/2)*y+42 = 0

42-7/2*y = 0 // - 42

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

y = -42/(-7/2)

y = 12

y = 12

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