Question

Write two integer whose sum and difference is 7

Answer 1

let them b x and y

ATP, x+y=7 ------(1) ; x= 7+y ----(2)

by (1) &(2),

=>7+y +y =7 => 2y=0 => y=0

now by (1)

x=7

•°•two such integers are 0 & 7