Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2014-01-21 15:44:03

RFMNZ
Guest

Word Problem - 10% off a CD. I paid $18. What was orig price of cd?

I know this is really simple, but I am drawing a complete blank. Thanks! smile

Q: You have a coupon for 10% off the price of a CD. You pay $18 for a CD. How much would you pay if you did not have a coupon?

I know the answer is $20, but I cannot figure out the equation. Thank you!

Finally figured it out.

90/100=18/x
cross multiply
90x=1800
x=20

#2 2014-01-21 20:54:11

bob bundy
Moderator
Registered: 2010-06-20
Posts: 6,469

Re: Word Problem - 10% off a CD. I paid $18. What was orig price of cd?

hi RFMNZ

Call the normal price x.

Then

Can you finish it from here?

Bob


You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

Offline

Board footer

Powered by FluxBB