7 tons of cement 11.67 tons of gravel 16.33 tons of sand. Say X is the amount of cement (don't worry about the 3). How much gravel is there in relation to cement? 5/3 as much.For every 3 of cement, there's 5 of gravel. How about the sand? There's 7/3 as much sand as there is cement.So now you can restate the whole thing with respect to cement: However much cement + 5/3 more gravel than cement + 7/3 more sand than cement = 35 tons. X + (5/3)X + (7/3)X = 35. X ends up equaling 7, (5/3)X is 11.67, and (7/3)X is 16.33. Hope this helps!
