13.3x + 8.1 = 74.6
C. 5
The answer will be 5 the reason why is when you multiple 13.3x its really 13.3 x 5= 66.5+8.1 will be 74.6
You can solve this by dividing the baches into the total amount of donuts.
147/7=21
Each batch has 21 donuts.