Final answer:
In the winter of 2021, it snowed in Buffalo, New York for 45 days.
Step-by-step explanation:
In the winter of 2021, for every day it did not snow in Buffalo, there were _x_ days it did snow. This implies that each time it snowed, there was a corresponding day when it did not snow. Since winter in Buffalo is approximately 90 days long, we can set up the equation:
x + (90 - x) = 90
Solving this equation, we find that x = 45.
Therefore, it snowed in Buffalo, New York for 45 days in the winter of 2021.