Question

Find two numbers whose sum is 80 and whose difference is 16.

Answer 1

sum x+y=80.......{1}
x-y=16..........{2}

add 2 equation
2x=96

x=96/2
x=48
then substitute X in the equation 1 or equation 2
here i was taken equ 1
x+y=80

x=48

48+y=80

y=80-48
y=32
that numbers are 48 and 32