There are x no of 5 rupee coins and the no. of 2 rupee coins is 3 times more than the no of 5 rupee coins. Their total sum=₹77. Find the number of ₹2 coins and ₹5 coins.

Answer 1

Add up their value:

5x + 2(3x) = 77

Now find x and thus 3x.

Answer 2

5x+2(3x)=77
5x+6x=77
11x=77
x=77/11
.`.[x=7]