Rita bought some large packets of salt weighing 500grams each and some small packets of salt weighing 200 grams each. If she has
8 packets altogether and they weigh 2200 grams in total, how many of each kind does she have?
1 answer:
L+S=8, L=8-S
500L+200S=2200, using L from above in this equation gives you:
500(8-S)+200S=2200
4000-500S+200S=2200
4000-300S=2200
-300S=-1800
S=6, and since L=8-S:
L=2
So Rita bought 2 large packets and 6 small packets.
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