Jake is comparing the prices of two laundry service companies. company a charges $20 per load and an additional $8 as service charges. company b charges $24 per load and an additional $4 as service charges.

part a: write equations to represent company a and company b's total laundry charges for a certain number of loads. define the variable used in the equations.

part b: which company would charge less for 5 loads of laundry? justify your answer.

part c: how much money is saved by using the services of company a instead of company b to clean 9 loads of laundry?