Answer:
This is a Word Problem.
Just apply a bit of Intuition and Follow the question as it comes.
Let the number be y
20+y
10(20+y) = 60
divide both sides by 10
20+y = 6
y=6-20
y=-14
To verify this
10(20-14)
10(6)
=60.
So -14 is the correct answer
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