30/20=y/7

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Solution for 30/20=y/7 equation: 


y in (-oo:+oo)

30/20 = y/7 // - y/7

30/20-(y/7) = 0

3/2-1/7*y = 0 // - 3/2

-1/7*y = -3/2 // : -1/7

y = -3/2/(-1/7)

y = 21/2

y = 21/2

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