SOLUTION: Joe tossed 4 into the pot. Their average weight was 6 lb. Then he tossed in 5 more whose average weight was 7 lb. Then he threw in a big one. The overall average eight of all of th

Algebra ->  Divisibility and Prime Numbers  -> Lessons -> SOLUTION: Joe tossed 4 into the pot. Their average weight was 6 lb. Then he tossed in 5 more whose average weight was 7 lb. Then he threw in a big one. The overall average eight of all of th      Log On


   

Question 176558: Joe tossed 4 into the pot. Their average weight was 6 lb. Then he tossed in 5 more whose average weight was 7 lb. Then he threw in a big one. The overall average eight of all of them was 7 lb. What did the big one weigh?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
(4(6)+5(7)+x)/10=7
:
59+x=70...multiplied both sides by 10
:
highlight%28x=11%29pounds for the Big One