Answer:
64 and 16
Step-by-step explanation:
Let's call the first number x and the second number y.
If the sum of the two numbers is 80, we can write the following equation
x + y = 80
Additionally, one number is 4 times a second number, so
x = 4y
Therefore, we have the following system of equations
x + y = 80
x = 4y
Now, we can replace the second equation on the first equation
x + y = 80
4y + y = 80
5y = 80
Solving for y, we get
5y/5 = 80/5
y = 16
Then, the value of x is
x = 4y
x = 4(16)
x = 64
Therefore, the two numbers are 64 and 16.