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.

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!