The secret to verifying math: the power of substitution
In short: Equations are essentially puzzles where you need to find the missing piece. This video explains how to check if a specific number correctly solves an equation by plugging it back in.
In algebra, a 'solution' is simply a value that makes an equation true. By using substitution, students can replace a variable with a specific number to see if both sides of the equals sign balance out.
This skill is a fundamental building block for 6th-grade mathematics, moving students from basic arithmetic into the world of variable expressions and algebraic logic.
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Sources
- Summary by Intellect · source: How to test solutions to equations using substitution | 6th grade | Khan Academy
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