SOLUTION: A purse contains rupees 5 coins and some rupees 10 coins. If the total no of these coins is 20 and the total value of these coins is rupees 175. Find the no. of rupees 10 coins in
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Question 899867: A purse contains rupees 5 coins and some rupees 10 coins. If the total no of these coins is 20 and the total value of these coins is rupees 175. Find the no. of rupees 10 coins in the purse. Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! x+y=20,
5*x+10*y=175
x=20-y
5*(20-y)+10*y=175
100-5y+10*y=175
5*y=75
y=15
x=20-y
x=5 y=15
check
5+15=20
5*x+10*y=175
5*5+10*15=175
25+150=175
175=175
ok
