Question

Please help me with this question

Steven charges the following for repairing washing machines:
£24 call-out charge + £14 for each half-hour he spends on the repair
If a repair costs a customer £66, how long did it take?

Answer 1

Answer:

4 hour 30 minutes

Step-by-step explanation:

total charge of repair = 66

duration charge for repairing = 14 per half hour

call out charge = 24

let x be the duration.

total cost = call out charge + cost * duration (x)

66 = 24 + 14 * x

66 - 24 = 14x

42 = 14x

42/14 = x

3 = x

one unit of duration is half hour .

now 3 * half hour that is,

4 hour 30 minutes