Question
Hilda baked banana, durian and cheese tarts. There were one-third as many cheese tarts as durian tarts and an equal number of cheese tarts as banana tarts. The cost of each tart is given as shown.

1 cheese tart: $1.60
1 durian tart: $1.20
1 banana tart: $1.40

If she collected $198 from selling all the tarts, how many durian tarts were there?
3 m

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Hilda baked banana, durian and cheese tarts. There were one-third as many cheese tarts as durian tarts and an equal number of cheese tarts as banana tarts. The cost of each tart is given as shown.

1 cheese tart: $1.60
1 durian tart: $1.20
1 banana tart: $1.40

If she collected $198 from selling all the tarts, how many durian tarts were there?