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Ch. 1 - Equations and Inequalities
Lial - College Algebra 13th Edition
Lial13th EditionCollege AlgebraISBN: 9780136881063당신이 사용하는 게 아니라요?교과서 변경
2장, 문제 15

Solve each equation. | 5/ (x-3) | = 10

검증된 단계별 안내
1
Identify the equation given: \(\left| \frac{5}{x} - 3 \right| = 10\). The absolute value expression means the quantity inside the absolute value can be either positive or negative 10.
Set up two separate equations to remove the absolute value: 1) \(\frac{5}{x} - 3 = 10\) 2) \(\frac{5}{x} - 3 = -10\)
Solve the first equation \(\frac{5}{x} - 3 = 10\) by isolating \(\frac{5}{x}\): add 3 to both sides to get \(\frac{5}{x} = 13\). Then solve for \(x\) by multiplying both sides by \(x\) and dividing both sides by 13.
Solve the second equation \(\frac{5}{x} - 3 = -10\) by isolating \(\frac{5}{x}\): add 3 to both sides to get \(\frac{5}{x} = -7\). Then solve for \(x\) by multiplying both sides by \(x\) and dividing both sides by -7.
Check the solutions to ensure they do not make the denominator zero and verify if they satisfy the original absolute value equation.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Absolute Value Equations

An absolute value equation involves expressions within absolute value bars, which represent the distance from zero on the number line. To solve |A| = B, where B is positive, split the equation into two cases: A = B and A = -B, then solve each separately.
추천 영상:
06:00
Categorizing Linear Equations

Isolating the Variable

Before solving an equation, isolate the variable term on one side to simplify the problem. This often involves performing inverse operations such as addition, subtraction, multiplication, or division to both sides of the equation.
추천 영상:
가이드 코스
05:28
Equations with Two Variables

Checking for Extraneous Solutions

When solving absolute value equations, some solutions may not satisfy the original equation due to the nature of absolute values. Always substitute solutions back into the original equation to verify their validity.
추천 영상:
05:21
Restrictions on Rational Equations