anonymous
  • anonymous
A stamp collector bought 160 stamps for $25.00. The purchase included 5¢ stamps, 15¢ stamps, and 25¢ stamps. The number of 15¢ stamps is three times the number of 5¢ stamps. How many of each type of stamp was purchased?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
So the number 15 cent stamps is 3 x the number of 5 cent stamps
sohailiftikhar
  • sohailiftikhar
so here we have 5cen+15cent+25cent=160
sohailiftikhar
  • sohailiftikhar
let number of 5cent stamp is x so find x

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sohailiftikhar
  • sohailiftikhar
as 15 is 3 times of 5
anonymous
  • anonymous
gottcha
sohailiftikhar
  • sohailiftikhar
so 25 will be 5 times of 5cent
sohailiftikhar
  • sohailiftikhar
now x+3x+5x=160
anonymous
  • anonymous
ohh okay!
sohailiftikhar
  • sohailiftikhar
want to try ?
anonymous
  • anonymous
yeah i will try in a bit. i have to go do something! im going to see if i could get openstudy on my phone! thx
sohailiftikhar
  • sohailiftikhar
np :)
anonymous
  • anonymous
okay i have 5 minutes, so what do i need to plug in?
anonymous
  • anonymous
i still need help :(

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