a car repair shop charge $80 per hour for labor and $210 for the parts of a car . if the total cost of repair for the car was $490 , how many hours did it take ro repair the car ?
total cost=80*h+210
solve for h.
subtract 210 from each side
divide each side by 80
To find out how many hours it took to repair the car, we can set up an equation based on the given information.
Let's assume the number of hours it took to repair the car is represented by 'h'.
The labor cost can be calculated by multiplying the number of hours by the hourly rate of $80: 80h.
The total cost of repair is the sum of the labor cost and the cost of parts: 80h + 210.
We know from the problem that the total cost of repair is $490.
Now we can set up the equation:
80h + 210 = 490
To solve for 'h', we subtract 210 from both sides of the equation:
80h = 490 - 210
Simplifying the right side gives:
80h = 280
Finally, to solve for 'h', we divide both sides of the equation by 80:
h = 280 / 80
Simplifying further gives:
h = 3.5
Therefore, it took approximately 3.5 hours to repair the car.