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Number and Algebra
Pls help. Thanks!
Replies
8
Kai Meng
Let u be the number of small packets.
(70-u) x 90 = 70u + 1020
6 years ago
Goh Thsu Chuan
29-1/3
6 years ago
Goh Thsu Chuan
Sorry misunderstood the q, answer shall be 33
6 years ago
Connie Lim
Yes, answer is 33. I have used the guess and check method to get it. Any better method to share?
6 years ago
Kai Meng
Hi Connie Lim, The one line method above not good enough?
6 years ago
Connie Lim
Not quite understand e method. π
6 years ago
Kai Meng
u is number of small packets, so 70-u is number of big packets.
Multiply each by their respective mass and equate according to the statement about 1020 more for big packets.