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The sum of two numbers is 60

The sum of two numbers is 60. One number is 4 times as large as the other.

What are the numbers?

Duration: 
expired

Solution Let: x = the first

Solution

Let:

x = the first number
4x = the second number

Therefore:

x + 4x = 60 (The sum of two numbers is 60.)

Solving for x;

5x = 60
x = 12

Therefore, the first number is 12 and the second number is 4(12) = 48.

CHECK:
x + 4x = 60
12 + 48 = 60
60 = 60 (Check)