Question

solve it because i dont know what is ans

soch samajh k dena anshwer

Answer 1

Let smile face be a and sad be b.
From faces 1 and 3

a+b= 13 .............. 2

b-a = 1 .......... 4

Adding 2 and 4
a + b + b - a = 13 + 1

2b = 14

b = 7

So sad face = 7



HOPE IT IS MOST HELPFUL !!!!!!!!

Answer 2

let the smile be x
sad be y
so
x+y=13 ------(i)

x-y=1--------(ii)
from (i) &(ii)
2x= 14
x=7
7-y=1
y=6