Question

The bill for the repair of a computer was $179 the cost of parts was $44 and labor charge was $45 per hour.How many hours did it take to repair the computer

Answer 1

3 hours

Explanation:

Let

x ----> the number of hours

y ----> the total cost per repair the computer

we know that

The total cost per repair the computer is equal to the cost of the parts plus the number of hours it take to repair the computer multiplied by $45 per hour

so

The linear equation that represent this problem is

`y=45x+44`

For y=$179

substitute in the linear equation and solve for x

`179=45x+44`

`45x=179-44`

`45x=135`

`x=3\ hours`