Question

The sum of two numbers is 139 and the difference is 53. Explain how to find the two numbers.

Answer 1

43 & 96

Explanation:

x=one number

y=other number

x+y=139

x-y=53 x=y+53

substitute for x

y+53+y=139

reduce

2y+53-53=139-53

2y=86

2y/2=86/2

y=43

x=96