SOLUTION: A grain storage warehouse has a total of 30 bins. Some hold 20 tons of grain each, and the rest hold 15 tons each. How many of each type of bin are there if the capacity of the war

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A grain storage warehouse has a total of 30 bins. Some hold 20 tons of grain each, and the rest hold 15 tons each. How many of each type of bin are there if the capacity of the war      Log On


   

Question 71362This question is from textbook
: A grain storage warehouse has a total of 30 bins. Some hold 20 tons of grain each, and the rest hold 15 tons each. How many of each type of bin are there if the capacity of the warehouse is 510 tons? This question is from textbook

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
m = the number of 15-ton silos
n = the number of 20-ton silos
m+%2B+n+=+30
15m+%2B+20n+=+510
multiply the 1st by 15
15m+%2B+15n+=+450
subtract from the 2nd
5n+=+60
n+=+12
m+=+18
check answer
15m+%2B+20n+=+510
15%2A18+%2B+20%2A12+=+510
270+%2B+240+=+510
510+=+510
OK