To perform the correct operation as to subtract numbers, make sure the denominators are the same, and then one can then subtract and remove a smaller number from the larger one.
This same method also holds true for adding fractions together as well.
Another way to subtract fractions is to convert them from fraction form to decimal form and then align the decimal points and subtract the values.
30 + 2 = 32
"Alia gets 4^2 fewer than Kelly, who gets 3^3."
So it's about a subtraction.

Hope this helps.
r3t40
Answer:
what to do here I don't know sorry
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X=number of weeks
We can suggest this inequation:
17x>175.5
x>175.5/17>10.323>11 (the solution have to be a whole number, therefore the answer will be 11 weeks or more)
Answer: Tomas need save money during 11 weeks.