Posted by **Kaloy** on Thursday, August 9, 2012 at 8:27am.

Mr. R has some money to buy oranges, if he will buy 15 oranges he will need $90 more, if he will buy 10 oranges he will have $60 left. how much money has mr. R?

- Math -
**MathMate**, Thursday, August 9, 2012 at 8:44am
Let r=amount of money in dollars Mr. R has

and

x=cost of each orange

We will set up the equations

15x=r+90

10x=r-60

You can then solve for r and x by the method of elimination, substitution, or comparison.

- Math -
**drwls**, Thursday, August 9, 2012 at 8:48am
Buying 5 more oranges costs an extra $150. Therefore they cost $30 each.

Buying ten oranges costs $300 and leaves him with $60. Therefore he started out with $360.

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