Question

the sum of two number is 8.if their sum is four time their difference find the numberR

Answer 1

let, the numbers be x and y
then
x+y=8
and
x+y=4(x-y)
=8=4(x-y)
=x-y=2
Now
adding both the equation we get
x=5 and y=3
thus the number is 53