SOLUTION: The sum of two numbers is 75. The difference between those numbers is 21. What are the two numbers?  

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Question 932956: The sum of two numbers is 75. The difference between those numbers is 21. What are the two numbers?
 
Answer by ptfile(81) About Me  (Show Source):
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Let x = the first number
y = the second number
The sum of two numbers is 75.
x+y=75
The difference between those numbers is 21.
x-y=21
x+y=75
x-y=21
2x=96
x=48
Substitute x with 48
48+y=75
y=75-48
y=27
The numbers are 27 and 48.
Check
48-27 = 21
21 = 21