Question

the sum of two numbers is 9 and their difference is 3

Answer 1

Answer:

let the no. s be. x and y....

let the no. s be. x and y....according to question....

let the no. s be. x and y....according to question....x+y=9...........1

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......2

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......22x=12..

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......22x=12..x=6......put this in equation 1....

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......22x=12..x=6......put this in equation 1....x+y=9

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......22x=12..x=6......put this in equation 1....x+y=9y=9-6

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......22x=12..x=6......put this in equation 1....x+y=9y=9-6y=3......

let the no. s be. x and y....according to question....x+y=9...........1x-y=3....{ y to be cancelled }......22x=12..x=6......put this in equation 1....x+y=9y=9-6y=3......so no.s are 3 and 6..

Answer 2

Let the numbers be n and m.

n + m = 9

n - m = 3

Add the 2 equations and get

2n = 12

n = 6

m = 9 - n  = 9 - 6 = 3

So, the numbers are 3 and 6.