Working with a friend, Kai makes 3 times as many clocks a day as she does working alone. Kai makes 60 clocks a day with a friend. How many can Kai make in 5 days, working alone?
A.
20
B.
36
C.
100
D.
180
Exam No：2021 First Round Grade 4 Year：2021 Question No：18
Answer:
C
Knowledge points:
G4 - Algebra - Find the Unknown (Balancing)
Solution:
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