Question

The sum of two numbers is 39. One number is 2 times as large as the other. What are the numbers?​

Answer 1

13 and 26

Explanation:

Let's say x and y are our two numbers. We know that:

1) x + y = 39

2) x = 2 * y We could also say y = 2 * x, but I chose x to be larger.

We can use the method of substitution, plugging the second equation into our first and then solving:

(2 * y) + y = 39

3 * y = 39

y = 13

Using our second equation:

x = 2 * (13)

x = 26