harpazo
Full Member
- Joined
- Jan 31, 2013
- Messages
- 891
The sum of the digits of a 2 digit number is 9. If the digits are reversed, the new number is 9 less than 3 times the original number. Find the original number.
Solution:
Let r = tens digit
Let s = ones digit
r + s = 9
10s + r = 3(r + s) - 9
Is this the correct set up?
Next week, I will post distance word problems as I make my way through algebra applications followed by geometry and then trigonometry applications. Lots of practice with word problems just ahead. My main concern, as I've stated many times, is the set up.
Solution:
Let r = tens digit
Let s = ones digit
r + s = 9
10s + r = 3(r + s) - 9
Is this the correct set up?
Next week, I will post distance word problems as I make my way through algebra applications followed by geometry and then trigonometry applications. Lots of practice with word problems just ahead. My main concern, as I've stated many times, is the set up.