Business Mathematics Brief 12th Edition by Stanley Salzman ,Gary Clendenen, Charles Miller

Exercise 168

Solve the following application problems. Steps 1 - 7 are repeated here for your convenience-use them.
Solving Applied Problems
Step 1 Read the problem carefully. A sketch may help.
Step 2 Identify the unknown and choose a variable to represent it. If possible, write any other unknowns in terms of the same variable.
Step 3 Translate the problem into an equation.
Step 4 Solve the equation.
Step 5 Answer the question(s) asked in the problem.
Step 6 Check your solution using the original words of the problem.
Step 7 Be sure your answer is reasonable.
AUTO REPAIR One week, revenue from the 95 repairs at an auto repair shop totaled $20,040. The average charges for repairs on personal and commercial vehicles were $250 and $180 respectively. Find the number of each type of vehicle repaired._____