Question

A teacher has b boxes of pencils, with 10 pencils in each box. She gives away 4 boxes to the students in her class. How many pencils does she have left?

Answer 1

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Answer:

10b -40

Explanation:

After giving away 4 of the b boxes she started with, she has (b-4) boxes remaining. Since there are 10 pencils in each box, the number of pencils she has left is ...

10(b -4) = 10b -40