810 : у = 30 + 30 + 30

Question

810 : у = 30 + 30 + 30

Comments

810:y=90

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y=810:90

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y=9

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81:y=90

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y=81/90

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ой

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там 810

Answer 1

810/у=90/1
90у=810
у=810/90
у=9

Answer 2

810 : y =90
Y = 810 : 90
Y =9