Question

The difference of two numbers is 7, and their sum is 49. Find the two numbers.

Answer 1

x= 28 and y=21

Explanation:

x - y = 7

x + y = 49

add the two equation and the y's will cancel out

2x = 56 divide by 2

x = 28

replace 28 for x in the first equation and solve for y

28 - y = 7

y = 21