That number is 10

Step-by-step explanation:

Let that number be x

Then, 4x-20 = 20

4x = 20+20

x = 40/4

x = 10

Answer:

10

Step-by-step explanation:

Let the number be y.

then,4y-20=20.

on transposition of 20

4y=20+20

4y=40

y=40/4

y=10

the number is 10