4=y/9

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Solution for 4=y/9 equation: 


y in (-oo:+oo)

4 = y/9 // - y/9

4-(y/9) = 0

4-1/9*y = 0 // - 4

-1/9*y = -4 // : -1/9

y = -4/(-1/9)

y = 36

y = 36

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