The product of a number and 4 is 20? What is the number?

1 Answer
Mar 4, 2017

The number is #5#.

Explanation:

Saying that the product of a number and #4# is #20#, is the same as saying that the number is #20# divided by #4#.

To illustrate, we will use an equation:

Consider the number as #N#.

Since the product of the number and #4# is #20#, we can write:

#Nxx4=20#

If we divide both sides by #4#, we get:

#(Nxx4)/4=20/4#

Since both the numerator and denominator on the left have #4#, they can be cancelled.

#N=20/4#

#N=5#