Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
1. Equations & Inequalities
Linear Equations
2:42 minutes
Problem 22e
Textbook Question
Textbook QuestionSolve each equation. |3 - 2x | = |5 - 2x |
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Absolute Value
Absolute value represents the distance of a number from zero on the number line, regardless of direction. It is denoted by vertical bars, such as |x|, and is defined as |x| = x if x ≥ 0 and |x| = -x if x < 0. Understanding absolute value is crucial for solving equations that involve it, as it leads to two possible cases for each equation.
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Setting Up Cases
When solving equations involving absolute values, it is essential to set up separate cases based on the definitions of absolute value. For the equation |A| = |B|, we consider two scenarios: A = B and A = -B. This approach allows us to find all possible solutions by addressing both the positive and negative scenarios of the expressions involved.
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Solving Linear Equations
Linear equations are equations of the first degree, meaning they involve variables raised only to the power of one. To solve these equations, we isolate the variable on one side of the equation through algebraic manipulation, such as adding, subtracting, multiplying, or dividing both sides. Mastery of solving linear equations is fundamental in algebra, as it forms the basis for more complex problem-solving.
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