Understanding Variables
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Beginner
Start here! Easy to understand
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Beginner Explanation
Variables are symbols like $x$ or $y$ that can represent numbers.
Practice Problems
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1
Quick Quiz
Single Choice Quiz
Beginner
If $D = 10$, what is $E$ in the equation $E = D + 4$?
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2
Real-World Problem
Question Exercise
Intermediate
Teenager Scenario
Dan's age is represented by $D$. If Dan is 15, what is Emily's age using $E = D + 4$?
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3
Thinking Challenge
Thinking Exercise
Intermediate
Think About This
If $E = D + 4$ and $D$ is doubled, how does $E$ change?
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4
Challenge Quiz
Single Choice Quiz
Advanced
Given $E = D + 4$ and if $2E - 3D = 8$, find $D$.
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Recap
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