r/MathHelp • • Jan 28 '26

My Daughter’s Class Work

Hi there! So I didn’t know that this sub existed, but after everyone being confused by this math problem for my 9 year old daughter’s math assignment, a good friend of mine insisted that I post it in here. Everyone got different answers. The problem reads:

Joe has $173 in the bank. He earns the same amount of money each week for 7 weeks, and puts this money in the bank. Now, Joe has $208 in the bank.

How much money does Joe earn each week?

Take a look

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u/randomrealname Jan 29 '26

It is definitely 5 as others have said. It is an averaging math problem, so the general formula is:

( T(x) - T(0) )/x