The cost of a high school ring is $145 for the large size and $115 for the regular size. The total receipts form the sale of 120 rings was $15,060. How many rings of each size were sold?

Question

ganpat · Answer

let x be large size 
and y = regular size..

so, you have two equation.. 

145x + 115y = 15,060

and x + y = 120..

can u solve them ??

anonymous · Answer

145+115=260 
so it would be:
260=15,060

I don't think i'm doing this right.

ganpat · Answer

u r going wrong way.. 

x + y = 120 
x = 120 - y 

145x + 115y = 15,060
140 (120 - y)  +115y = 15060
16800 - 140y + 115y = 15060
25y = 1740 

y = 69.6 = 70 
x = 120 - 70 = 50...

anonymous · Answer

So 50 large rings were sold and 70 small were sold?

anonymous · Answer

right?