SOLUTION: add 9/10y + 15/4y

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Question 477294: add
9/10y + 15/4y

Answer by Maths68(1474) About Me  (Show Source):
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9/10y + 15/4y
= 9/10y + 15/4y
= (9*2 + 15*5)/20y
= (18+45)/20y
= 63/20y