Is anyone good at "Linear Equations"?

Question

anonymous · Answer

yes

anonymous · Answer

Ok, sweet.  I have a few problems I need help with. Can you explain how to solve them for me?

cggurumanjunath · Answer

http://www.purplemath.com/modules/solvelin.htm

anonymous · Answer

what do you need ?

anonymous · Answer

Well heres one of the problems. :) 

Jimmy's Chocolate shop sells two different fudge bars. The dark chocolate fudge bars sell for $5 per pound and the milk chocolate fudge bars sell for $4 per pound. You purchased a combination of these bars for your family and friends and your bill came to $150. This scenario can be modeled by the equation 5d + 4m = 150. Which of the following is not a possible combination of dark chocolate fudge bars and milk chocolate fudge bars?
 	
	6 dark bars and 30 milk bars
	10 dark bars and 25 milk bars
	12 dark bars and 23 milk bars
	14 dark bars and 20 milk bars