Question

There are some 1 and 2 coins in a piggy bank. The number of 1 coins is half the
number of 2 coins. If the total amount of money in the piggy bank is 315, how
many 1 and 2 coins are there in the piggy bank?​

Answer 1

Answer:

Therefore there are 210 coins of rupee 2 and wot coins of rupee of 1.

Step-by-step explanation:

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Answer 2

Answer:

number of rupee 1 coins=63

number of rupees 2 coins=126

Step-by-step explanation:

let number of rupee 1 coins be = 'a'

let number of rupees 2 coins be = 'b'

so, first equation is a=1/2b

2a-b=0

second equation is a+2b=315

we substitute value of b from equation 1 as 2a and put it in second equation.

so, a+2(2a)=315

a+4a=315

5a=315

a=315/5=63=number of rupee 1 coins

we substitute value of a in equation 1 as 63.

2(63)-b=0

126-b=0

b=126=number of rupees 2 coins