Name: Tom

Who is asking: Teacher
Level: All

Question:
Dear sir:
I have had a rather heated arguement with my students. Please settle this for me.

Solve <,>, =
6.99999... __ 7

Thank you.

Hi Tom
Let

x = 6.99999...

Multiply both sides by 10 to get
10x = 69.99999...

Subtracting the first equation from the second gives

10x - x = 69.99999... - 6.99999...

or
9x = 63.

Thus
x = 7.

Cheers,
Penny

 

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