1 Answer

SuperUser · Answer 1 · 2018-07-26T12:23:00+0000

The least common denominator is 5y, and can be obtained by multiplying
-1/y by 5/5 to get -5/5y.

If we add the numbers using the least common denominator, we get:
-5/5y + 2/5y = -3/5y

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