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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 16

Solve each equation. |3/ (2x - 3) | = 4

검증된 단계별 안내
1
Identify the equation given: \(\left| \frac{3}{2}x - 1 \right| = 4\). The absolute value expression means the quantity inside the absolute value can be either positive or negative but its distance from zero is 4.
Set up two separate equations to remove the absolute value: one where the inside expression equals 4, and one where it equals -4. So, write: \(\frac{3}{2}x - 1 = 4\) and \(\frac{3}{2}x - 1 = -4\).
Solve the first equation \(\frac{3}{2}x - 1 = 4\) by isolating \(x\). Add 1 to both sides to get \(\frac{3}{2}x = 5\), then multiply both sides by the reciprocal of \(\frac{3}{2}\), which is \(\frac{2}{3}\), to find \(x\).
Solve the second equation \(\frac{3}{2}x - 1 = -4\) similarly. Add 1 to both sides to get \(\frac{3}{2}x = -3\), then multiply both sides by \(\frac{2}{3}\) to find \(x\).
Write the two solutions for \(x\) obtained from the two equations. These are the values of \(x\) that 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, set the expression inside the absolute value equal to both the positive and negative values of the number on the other side of the equation.
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Categorizing Linear Equations

Isolating the Variable

Before solving an equation, isolate the variable term by performing inverse operations such as addition, subtraction, multiplication, or division. This simplifies the equation and makes it easier to solve for the variable.
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Equations with Two Variables

Solving Linear Equations

Linear equations are equations of the first degree, meaning the variable is not raised to any power other than one. After isolating the variable, solve the resulting linear equations by performing arithmetic operations to find the variable's value.
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Solving Linear Equations with Fractions