Question

four-fifths of a number is 20 less than the original number. find the original number​

Answer 1

Answer:

100

Step-by-step explanation:

Let the number be x

By the problem

x - 20=4/5x

or, 5x - 100 = 4x

or, 5x - 4x = 100

or, x = 100

Answer 2

Answer:

So, the original number is 100.