Question
Buns are sold in Penelope Cake Shop at the prices as shown:

1 vanilla bun $2.80
1 apple bun $1.90

MrsChye bought 7 more apple buns than vanilla buns from this cake shop. She paid $18 in total. How many buns did Mrs Chye buy altogether?
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Buns are sold in Penelope Cake Shop at the prices as shown:

1 vanilla bun $2.80
1 apple bun $1.90

MrsChye bought 7 more apple buns than vanilla buns from this cake shop. She paid $18 in total. How many buns did Mrs Chye buy altogether?