Question
PSLE
Mr Yang bought some guppies at $10 each. He also bought an equal number of catfishes at a different price. The average price of a guppy and a catfish was $9. Mr Yang paid $22 more for the guppies than the catfishes. How many guppies did he buy?
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PSLE
Mr Yang bought some guppies at $10 each. He also bought an equal number of catfishes at a different price. The average price of a guppy and a catfish was $9. Mr Yang paid $22 more for the guppies than the catfishes. How many guppies did he buy?