Unit 6 · Algebra
Wed=$30, Fri=$80, x=$9 — What Is Thursday?
Lesson 11 of 12
About this lesson
Cho's money box is empty on Monday morning. By Wednesday she has $30, by Friday she has $80. She saves the same amount on Tuesday, Wednesday and Friday. The twist: Thursday's deposit is an unusual large number ($41) — not one of the equal amounts. Students must first find the equal daily amount from the Wed total, then use the Fri total to isolate Thursday.
Chapters
Question
Cho saves money by putting it in a money box.
At the start of Monday, the box is empty.
At the end of Monday, the box contains $12. At the end of Wednesday, the box contains $30. At the end of Friday, the box contains $80.
She puts in the same amount of money on each of Tuesday, Wednesday and Friday.
How much money does she put in on Thursday?
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