Question
PSLE
Mr Fong bought some catfishes at $9 each. He also bought an equal number of neon tetras at a different price. The average price of a catfish and a neon tetra was $6. Mr Fong paid $18 more for the catfishes than the neon tetras. How many catfishes did he buy?
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PSLE
Mr Fong bought some catfishes at $9 each. He also bought an equal number of neon tetras at a different price. The average price of a catfish and a neon tetra was $6. Mr Fong paid $18 more for the catfishes than the neon tetras. How many catfishes did he buy?