Question

The sum of 2 numbers is 16 and their difference is 4.

Answer 1

answer: 10 and 6

sum of 10 n 6 is 16 and their difference is 4

Answer 2

Answer:

let one number be x and

let another number be y

therefor x + y = 16 ------(eq 1)

x - y = 4 --------(eq2)

by substitution method

from eq 1

x + y = 16

x = 16 - y ---------(eq3)

put the value of x in eq 2

x - y = 4

16 - y - y = 4

16 -2y = 4

16 - 4 = 2y

12 = 2y

12/2 = y

6 = y

put the value of y in eq 3

x = 16 - 4

x = 12