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Question:

When a number is subtracted from 125 and the result is divided by 12, the answer obtained is twice the original number. What is the number?

A 5
explanation

Let a be the number: \(\frac{\mathrm{(125-a)} }{\mathrm{12}} =2a\)
125−a=12(2a)
125−a=24a
125=24a+a
125=25a
a=5