SOLUTION: A truck was tranferring fertilizers. The first day it transferred 2/5 of the entire pile of the fertilizers. The second day it transferred 3/4 of remaining of the fertilizers. T

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Question 679614: A truck was tranferring fertilizers. The first day it transferred 2/5 of the entire pile of the fertilizers. The second day it transferred 3/4 of remaining of the fertilizers. There are 1200 pounds of fertilizers left. How much fertilizers was there before the transferring?
Thanks,
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = pounds of fertilizer to start with
After 1st day, there is
+x+-+%282%2F5%29%2Ax+=+%283%2F5%29%2Ax+ left
After 2nd day, there is
+%283%2F5%29%2Ax+-+%283%2F4%29%2A%283%2F5%29%2Ax+=+%283%2F5%29%2Ax%2A%28+1+-+3%2F4+%29+
+%281%2F4%29%2A%283%2F5%29%2Ax+ left
You are given that
+%28+3%2F20+%29%2Ax+=+1200+
+3x+=+24000+
+x+=+8000+
There were 8000 pounds of fertilizer to start with