One variable Problem 3
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Lesson Summary:
In this lesson, you will learn how to define two unknown numbers that add up to a given number using algebra and one variable. By using the pattern that the second number will be the given number minus the first number, you can easily define the two unknown numbers. The lesson then goes on to show how to solve a problem where you have to find two numbers that add up to a given number and also satisfy a given equation involving them.
Lesson Description:
Learn how to use algebra and one variable to define more than one unknown quantity, write an equation, solve it, and check it. Shows how to define 2 variables if their sum is a given number.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- How do you solve basic word problems in Algebra?
- How do you set up and solve / check Algebra puzzles / riddles?
- How can you check a word problem in Algebra?
- How do you write an equation from a word problem?
- How do you write the answer to a word problem in Algebra?
- How do you translate words into an equation?
- How can you find two different values from a word problem by using just one variable?
- How can you use one variable to define two numbers that add up to a given number?
- If the sum of two numbers is 10, how can you use one variable to define the two numbers?
- How can you define two numbers that add up to 12?
- What variable expressions represent two numbers that add up to 20?
- How do you write expressions for two numbers that add to 30?
- What numbers add up to 45?
- If the sum of two numbers is 18, and the sum of three times the smaller and twice the larger is 44, how do you find the two numbers?
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Staff Review
This lesson explains how to write an equation with just one variable in a word problem in which you need to find two numbers that add up to another number. Several examples are used to drive home the idea of finding variable expressions that add up to a number. All steps are explained in the word problem puzzles in this video. This is a very good introduction to solving word riddles.
