Math Problem Statement

Find a number such that ¼ of the number is 50 less than 2/3 of the number.

Solution

To find a number such that 14\frac{1}{4} of the number is 50 less than 23\frac{2}{3} of the number, let's represent the number by xx.

The problem can be translated into the equation:

14x=23x50\frac{1}{4}x = \frac{2}{3}x - 50

Now, let's solve this equation step by step.

  1. Eliminate the fractions: Multiply every term by 12 (the least common multiple of 4 and 3) to eliminate the fractions.

12×14x=12×(23x50)12 \times \frac{1}{4}x = 12 \times \left(\frac{2}{3}x - 50\right)

This simplifies to:

3x=8x6003x = 8x - 600

  1. Isolate xx: Subtract 8x8x from both sides.

3x8x=6003x - 8x = -600

This simplifies to:

5x=600-5x = -600

  1. Solve for xx: Divide both sides by 5-5.

x=6005=120x = \frac{-600}{-5} = 120

Thus, the number is 120\boxed{120}.

Would you like more details on this solution, or do you have any questions?


Here are 5 related questions for further practice:

  1. Find a number such that 13\frac{1}{3} of the number is 40 less than 56\frac{5}{6} of the number.
  2. Find a number such that 15\frac{1}{5} of the number is 30 more than 12\frac{1}{2} of the number.
  3. If 25\frac{2}{5} of a number is equal to 60, what is the number?
  4. Solve for a number where 34\frac{3}{4} of it is equal to 23\frac{2}{3} of 90.
  5. Find a number such that 16\frac{1}{6} of the number is 20 less than 34\frac{3}{4} of the number.

Tip: When solving equations with fractions, multiplying through by the least common multiple of the denominators can simplify the process.

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Math Problem Analysis

Mathematical Concepts

Equations
Fractions
Multiplication

Formulas

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Theorems

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Suitable Grade Level

Grades 7-9