Variables in Real-World Equations
Learning Objective
I can Solve word problems leading to equations of the form px + q = r and p(x + q) = r, where p, q, and r are specific rational numbers. Solve equations of these forms fluently.
Key Concepts
Marcia makes $27 on every computer she sells, and her monthly expenses are $10,000.
To calculate Marcia's profit, we can use the equation: Profit = 27x - 10,000, where x is the number of computers sold.
To make a profit, Marcia needs to sell at least 371 computers in a month.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
View questions preview
1. What does the variable 'x' represent in the problem discussed in the video?
2. Write an equation that represents Marcia's profit, where 'x' is the number of computers she sells.
3. What does it mean for Marcia to 'break even' in terms of profit and expenses?
...and 9 more questions
Educational Video
Basic linear equation word problem | 7th grade | Khan Academy
Khan Academy