Topic Details (Notes format)

How to Solve Absolute Value Equations

Subject: Mathematics

Book: Maths Mastery

Absolute value equations have the general form |x| = a. This translates to x = a or x = –a, because absolute value represents distance from zero on the number line. For a more complex example, |2x – 6| = 4 means 2x – 6 = 4 or 2x – 6 = –4. Solving these yields x = 5 or x = 1. Absolute value appears in real-world contexts like measuring deviations from an average, keeping track of net distance traveled, or financial calculations involving profit/loss changes. Familiarity with absolute value equations enables flexible handling of scenarios involving direction or magnitude in everyday problem-solving.

Practice Questions

If 2x = 16, what is the value of x?

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What is the length of the diagonal of a square with a side length of 7 cm?

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The probability of getting an even number when rolling a die is:

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If x:y = 2:3 and z:y = 4:3, what is x:z?

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A car covers a distance of 150 km in 2.5 hours. What is its average speed?

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The perimeter of a rectangle is 50 cm, and its length is 15 cm. What is its width?

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If a right triangle has legs of 9 cm and 12 cm, what is the length of the hypotenuse?

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What is the slope of a line passing through the points (2, 3) and (4, 7)?

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The sum of the squares of two consecutive integers is 145. What are the integers?

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If x + y = 10 and xy = 21, what is the value of x³ + y³?

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