Question

12 points be fasttt...

Ravi has 20 coins worth rupees 85 if he has only 5 rupee and 2 rupee coins.. find the number of each type of coins

Answer 1

total money he have=rs 85
let 5 coin be x
and
let 2 coin be y
no. 5 ruppee coin be 5x
no. of 2 rs coin be 2x
1st equation
2x + 5x = 85
2nd equation
x+y=20
x=(20-y)
Now we have x value
we will put it in equation
5(20-y)+ 2y = 85
100-5y+2y=85
100-3y=85
15= 3y
y=5
coins are in no.
as we got y=5
and
x= 20-y
x=20-5
×=15
...
hope it helps
please mark as brainlist
...
Thankyou

Answer 2

let he has x no. of 5 and y no. of 2 rupee coin
then A.T.Q.
5x+2y=85.....(1)
and x+y=20....(2)
in equation 2nd, x=20-y
put value of x in equation 1st
5(20-y)+2y=85
100-5y+2y=85
100-3y=85
3y=15
y=5
so x=15
so the no of coins are 5 two rupee coin and 15 5 rupee coin
________________________________________________thanks_______