SOLUTION: A supermarket sells tuna in 90 g and 200 g tins. In one day, 112 tins of tuna were sold, with a total mass of 18 kg. How many tins of each type were sold?

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Question 1167482: A supermarket sells tuna in 90 g and 200 g tins. In one day, 112 tins of tuna were sold, with a total mass of 18 kg. How many tins of each type were sold?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
B of the 200 gram tins
112-B of the 90 gram tins

200B%2B90%28112-B%29=18000------ 1 kilogram is 1000 grams.

Simplify and solve for B.