• Word problem:
Carla is a music teacher. She earns $20 of commission per new student and a salary of $200.
Last month she earned a total of 300.
How many new students were last month?
• variable:
x = number of new students
• Equation:
200+20x = 300
• Solution:
200+20x=300
Subtract 200 from both sides of the equation
200-200+20x = 300-200
20x=100
Divide both sides by20:
20x/20 = 100/20
x= 5
• Conclusion.
Last month, 5 new students were inscribed.