Question
PSLE
Mr Thia bought some neon tetras at $10 each. He also bought an equal number of guppies at a different price. The average price of a neon tetra and a guppy was $9. Mr Thia paid $18 more for the neon tetras than the guppies. How many neon tetras did he buy?
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PSLE
Mr Thia bought some neon tetras at $10 each. He also bought an equal number of guppies at a different price. The average price of a neon tetra and a guppy was $9. Mr Thia paid $18 more for the neon tetras than the guppies. How many neon tetras did he buy?