A store has two different brands of laundry detergent. Brand A can do 80 loads of laundry and costs $12.75. Brand B does 36 loads of
laundry and costs $6.75

20=3.19

1=0.16

Step-by-step explanation:

Rounded to the nearest cent

12.75/80 to get unit price

Then unit price multiplied by 20

if you was gonna solve for a, a is a   < -12