Solving Algebraic Expressions
Learning Objective
I can write and solve algebraic expressions with one variable.
Key Concepts
In algebraic word problems, we assign variables to represent unknown quantities and construct equations to represent the relationships between them.
If there are three brothers whose ages are consecutive multiples of three and the sum of their ages is thirty-six, we can represent their ages as X, X + 3, and X + 6.
When solving algebraic word problems, the trickier part is constructing the equations from the given information, while solving them is the easier part.
Practice Questions
This lesson includes 3 practice questions to reinforce learning.
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1. Write an algebraic expression to represent the following: A number 'x' increased by seven, then doubled.
2. Evaluate the expression 3y - 5 when y = 4.
3. Sarah has 'n' number of books. John has twice as many books as Sarah. Together, they have 24 books. Which equation represents this situation?
Educational Video
Algebraic Word Problems
Professor Dave Explains