ANSWER
60 buttons.
EXPLANATION
Let the number of buttons in the container be x.
Then the number of buttons that are black are:

The number of buttons that are white

The difference between the white and the black buttons

Solve for x.



Hence there are 60 buttons in the container.
Answer:
-28
Step-by-step explanation:
multiply both 9 and 16 by 4 and then subtract the sum of 16 × 4 from 9 × 4.