Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

company a charges $3 per hour and an addtional $75 as serivce charges

y = 3x + 75

company b charges $2 per hour and an additional $85 as serivce charges

y = 2x + 85

3x + 75 = 2x + 85

x + 75 = 85

x = 10

y = 3*10 + 75 = 2*10 + 85

y = 30 + 75 = 20 + 85

y = 105 = 105

the charge for 10 h is in both companies with $105 the same.