Find the value of two numbers if their sum is 12 and their difference is 4

Question

Find the value of two numbers if their sum is 12 and their difference is 4

Answer 1

Let n and m be those two numbers

 

n + m = 12

n - m = 4 ——->  n = m+4

 

n+m=12

(m+4) + m = 12

2m + 4 = 12

2m = 8

m = 8/2

m = 4

 

n = m+4

n = 4+4

n=8