Question

Find two numbers if their sum is six and their difference is 36

Answer 1

Explanation:

Let the two numbers be x and y

x + y = 6

x - y = 36 Add the two equations.

2x = 42 Divide by 2

2x/2 = 42/2

x = 21

x + y = 6 Substitute for x

21 + y = 6 Subtract 21

21-21 + y = 6-21

y = - 15