Acomputer repair technician charges $35 for each job plus $21 per hour of labor and 110% of the cost of parts. the total charge for a 3-hour job was $169.50. what was the cost of parts for this job? write and solve an equation and justify each step in the solution.

The cost of parts was $65.

Step-by-step explanation:

Let the cost of parts = x

35  + 21(3) + 1.10x = 169.50

98 + 1.10x = 169.50

71.50 = 1.10x

71.50/1.10 = 65

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72