Question
Joelle has enough flour to bake either 21z cupcakes or 30 tarts. If she has finished baking 4z cupcakes and 20 tarts, how many more cupcakes can she still bake in terms of z?
2 m

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Joelle has enough flour to bake either 21z cupcakes or 30 tarts. If she has finished baking 4z cupcakes and 20 tarts, how many more cupcakes can she still bake in terms of z?