Question

question no.12 of given image

Answer 1

let 2 rupee coin be x, 5 rupee coin be y
therefore, x+y=36  
               => x=36-y
     therefore, 2x+5y=84
                => 2(36-y)+5y=84
                => 3y=12
                => y=4

therefore, there are 4 five rupee coins.

Answer 2

let the coins be x
₹2 coins = x
₹5 coins =36-x
A.T.Q.
2(x)+5(36-x)=84
2x+180-5x=84
180-84=5x-2x
96=3x
96÷3=x
32=x
so,
₹2 coins = x= 32 coins
₹5 coins =36-x= 4 coins