Question

the sum of two numbers is 9 and there difference is 3 what are the two numbers

Answer 1

let numbers be x and y

x+y= 9---------1

x-y=3-----------2

from equation 1

x=9-y

putting this equation in equation 2

9-y-y=3

9-2y=3

-2y=3-9

-2y=-6

y=-6/-2

y=3

Putting this value in equation 1

x+3=9

x=9-3

x=6