Question

Sum of two numbers is 42 and their difference is 8 . Find the numbers ?

Answer 1

Answer:

Given:

sum of two numbers is 42. Difference of two numbers is 8.

Proof:'

assume that two numbers are a , b

a + b = 42

a - b = 8

add both equations

2a = 50

a = 25

substitute in 1st equation

25 + b = 42

b = 17

Answer 2

$\: \: \: let \: \: \: \: 2 \: \: \: \: no \: \: \: \: \: be \: \: \: \: \: x \: \: \: \: \: \: nd \: \: \: \: \: y \\ \\ x + y = 42 \\ \\ x - y = 8 \\ \\ \\ adding \: \: \: \: both \: \: \: \: \: \: equation \\ \\ x + y = 42 \\ x - y = 8 \\ .......................... \\ 2x = 50 \\ \\ x = \frac{50}{2} \\ \\ x = 25 \\ \\ 25 + y = 42 \\ \\ y = 42 - 25 \\ \\ x = 17$

HOPE YOU HAVE GOT YOUR ANSWER