word problem: In a mixture of concrete, there are five lb of cement mix for each pound of gravel. If the mixture contains a total of 84 lb of these two ingredients, how many pounds of gravel are there?

Question

word problem:  In a mixture of concrete, there are five lb of cement mix for each pound of gravel.  If the mixture contains a total of 84 lb of these two ingredients, how many pounds of gravel are there?

rajee_sam · Answer

this is a ratio and proportion problem make the total amount of concrete into groups of 6 lb so for every 5 pound of cement there is one pound of gravel. Can you determine the amount of gravel now?

anonymous · Answer

That confused me a bit more.  I think I have it though x+5x=84
14+5*14=84  so x = 14

anonymous · Answer

14pounds of gravel

rajee_sam · Answer

yes