15/21=20y

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Solution for 15/21=20y equation: 


y in (-oo:+oo)

15/21 = 20*y // - 20*y

15/21-(20*y) = 0

15/21-20*y = 0

5/7-20*y = 0 // - 5/7

-20*y = -5/7 // : -20

y = -5/7/(-20)

y = 1/28

y = 1/28

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