Solve each equation. | (x - 4)/ 2| = 5

검증된 단계별 안내

Recognize that the equation involves an absolute value: \(| \frac{x - 4}{2} | = 5\). Recall that \(|A| = B\) means \(A = B\) or \(A = -B\).

Set up two separate equations based on the definition of absolute value: \(\frac{x - 4}{2} = 5\) and \(\frac{x - 4}{2} = -5\).

Solve the first equation \(\frac{x - 4}{2} = 5\) by multiplying both sides by 2 to eliminate the denominator: \(x - 4 = 10\).

Add 4 to both sides of the first equation to isolate \(x\): \(x = 10 + 4\).

Solve the second equation \(\frac{x - 4}{2} = -5\) similarly by multiplying both sides by 2: \(x - 4 = -10\), then add 4 to both sides to find \(x = -10 + 4\).

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주요 개념

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

Absolute Value Definition

The absolute value of a number represents its distance from zero on the number line, always as a non-negative value. For an expression |A| = B, where B ≥ 0, the solutions are A = B or A = -B. Understanding this is crucial for solving equations involving absolute values.

Solving Linear Equations

After removing the absolute value by considering both positive and negative cases, solving the resulting linear equations involves isolating the variable using inverse operations like addition, subtraction, multiplication, or division. This step finds the exact values of the variable.

Checking for Extraneous Solutions

When solving absolute value equations, it's important to verify each solution by substituting back into the original equation. This ensures no extraneous solutions, which can arise from the process of squaring or splitting the equation, are included in the final answer.