One number is four times another number. their sum is 20. what are the two numbers?

ANSWER

4 and 16

EXPLANATION

Let the numbers be m and n.

Since one number is four times another number, we write;

The sum of the numbers is 20.

This gives us another equation:

We put equation (1) into equation (2) to obtain:

Simplify:

Divide both sides by 5.

We substitute n=4 into equation (1) to get;

Hence the numbers are 4 and 16.

step-by-step explanation: