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olchik [2.2K]
3 years ago
13

Bobby has a bag containing 2 sizes of marbles. The big ones weigh 10 g and the small ones weigh 3 g. If there are three times as

many small ones as big ones and the bag weighs 209 g, how many big marbles does he have?
Mathematics
1 answer:
Vikentia [17]3 years ago
8 0

Answer:

There are 19 big marbles

Step-by-step explanation:

10a + 3b = 209

a = 3b

3b = 3b

10a + a = 209

11a = 209

a = 209/11

a = 19

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