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Digital SAT Math

Course: Digital SAT Math>Unit 2

Lesson 2: Linear equation word problems: foundations

Linear equation word problems — Basic example

Watch Sal work through a basic Linear equations word problem.

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• At 2.45, I understood the answer but confused the difference between answer 2 and 4 why 4 is not correct answer as it is also the ​addition
• Let's break the problem down to clear up any confusion. The variable we will use to represent the number of classes Kaylee will take is c.
- Kaylee has 19 hours available each week to complete homework. With this information, we can start the equation: ... = 19
- Kaylee is planning on spending 2 1/2 hours doing homework for each class that she takes. This means that we have to multiply the number of classes that she will take: c by 2 1/2 to find the total number of hours she will spend doing homework total. The equation that we have now is: 2 1/2c + ... = 19
- Finally, we are told that Kaylee will spend an additional 6 1/2 hours total doing assigned readings, not 6 1/2 hours for each class. The final equation will be: 2 1/2c + 6 1/2 = 19.
Does that make sense? Option #4 is incorrect because it shows that Kaylee will do 6 1/2 hours of reading for each class, which is not the case. I hope this helped! :)
• I did not understand why we are not multiplying c with 6 1/2
• This is because Kaylee will spend an additional 6 1/2 hours working on reading for all of her classes altogether, not for every individual class. Hopefully that clears up any confusion :)
• What easy way can I remember these problems?
• Try breaking it down piece by piece. to have an easy knowledge of the problem
• I am taking the psat in like a month, and I have only been averaging about 800-910 on the 8 and 9 versions. my goal for the 10tth grade one is to get a 1200 and above. How do you think I can accomplish that?
• Take the practice SAT tests on Kahn academy. That will really prepare you for the PSAT. I am taking the PSAT again soon and that's what I am doing to help me.
• What is the google classroom code
• Actually, it is not a code, but you can share it with any classes you have at Google Classroom. If you don't have one, you can't share. Try to create one.
(1 vote)
• noice
• hehhehehehe
• i want to give practice test according to these examples
how i can give these tests ?