Math Problem Statement

Solve for x

Solve for x in the equation: x/5 = (x+2)/9

Solution

The equation from the image is:

x5=x+29\frac{x}{5} = \frac{x+2}{9}

To solve for xx, let's follow these steps:

  1. Cross-multiply to eliminate the denominators: 9x=5(x+2)9x = 5(x + 2)

  2. Expand the equation: 9x=5x+109x = 5x + 10

  3. Isolate the variable by moving terms involving xx to one side: 9x5x=109x - 5x = 10 4x=104x = 10

  4. Solve for xx: x=104=2.5x = \frac{10}{4} = 2.5

So, the solution is x=2.5x = 2.5.

Would you like further clarification, or do you have any questions about this process?

Here are 5 related questions to deepen your understanding:

  1. How would you solve the equation if there were different constants in the denominators?
  2. Can this process of cross-multiplication be applied to any rational equation?
  3. What happens if one side of the equation is already simplified to a constant?
  4. Can you think of real-world problems that use ratios similar to this?
  5. How would the equation change if the fraction included a square term in xx?

Tip: Always check your solution by substituting the value of xx back into the original equation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Rational Equations
Cross-multiplication

Formulas

Cross-multiplication: a/b = c/d implies ad = bc

Theorems

Properties of equality

Suitable Grade Level

Grades 7-9