Solve each linear equation. See Examples 1–3. 2 [x - (4 + 2x) + 3] = 2x + 2
Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
0. Review of College Algebra
Solving Linear Equations
Problem R.6.81
Textbook Question
Solve each inequality. Give the solution set using interval notation. See Examples 8 and 9. -3(x - 6) > 2x - 2
Verified step by step guidance1
Start by distributing the -3 on the left side of the inequality: write the expression as \(-3 \times (x - 6)\) and apply the distributive property to get \(-3x + 18\).
Rewrite the inequality with the distributed terms: \(-3x + 18 > 2x - 2\).
Next, collect all the variable terms on one side and the constant terms on the other side. For example, add \$3x\( to both sides and add \)2\( to both sides to isolate terms: \)18 + 2 > 2x + 3x$.
Simplify both sides: combine like terms to get \$20 > 5x$.
Finally, solve for \(x\) by dividing both sides of the inequality by 5, remembering to keep the inequality direction the same since you are dividing by a positive number. Express the solution set in interval notation based on the inequality obtained.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Solving Linear Inequalities
Linear inequalities involve expressions with variables raised to the first power and inequality signs. To solve them, isolate the variable on one side by performing algebraic operations, similar to solving equations, but remember to reverse the inequality sign when multiplying or dividing by a negative number.
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Distributive Property
The distributive property allows you to multiply a single term across terms inside parentheses, i.e., a(b + c) = ab + ac. Applying this property correctly is essential to simplify expressions before solving inequalities.
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Interval Notation
Interval notation is a way to represent solution sets of inequalities using intervals. It uses parentheses for values not included and brackets for values included, clearly showing the range of possible solutions on the number line.
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i & j Notation
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