Answer:
4y
Step-by-step explanation:
y - -3y
Subtracting a negative is like adding
y+3y
Combine like terms
4y
Yes, indeed it does equal a whole number. 45/5 equals 9, which is a whole number. Whole numbers are numbers that you count up from and including 0 (0,1,2,3,4,5,6...)
You get 9 because 45/5 is the same as 45 divided by 5 which is 9.
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