Math Problem Statement

Find the values of x and y in the diagram below.

Find the values of x and y in the diagram below.

Solution

In the diagram, we observe vertical angles, which are equal to each other. The angle pairings are as follows:

  • The angle 7x27x - 2° is vertically opposite the angle 18y18y°.
  • The angle 11x3411x - 34° is vertically opposite the same angle 18y18y°.

Since vertically opposite angles are equal, we can set up the following two equations based on the diagram:

  1. 7x2=18y7x - 2 = 18y
  2. 11x34=18y11x - 34 = 18y

Now, let's solve this system of equations to find the values of xx and yy.

Solving the system:

  1. From the first equation: 7x2=18y18y=7x2y=7x2187x - 2 = 18y \quad \Rightarrow \quad 18y = 7x - 2 \quad \Rightarrow \quad y = \frac{7x - 2}{18}

  2. Substitute this expression for yy into the second equation: 11x34=18y11x - 34 = 18y Substituting y=7x218y = \frac{7x - 2}{18} into this: 11x34=18(7x218)11x - 34 = 18\left(\frac{7x - 2}{18}\right) Simplifying: 11x34=7x211x - 34 = 7x - 2 Now, solve for xx: 11x7x=2+3411x - 7x = -2 + 34 4x=324x = 32 x=8x = 8

Finding yy:

Now that we have x=8x = 8, substitute this into the equation for yy: y=7(8)218=56218=5418=3y = \frac{7(8) - 2}{18} = \frac{56 - 2}{18} = \frac{54}{18} = 3

Final Answer:

  • x=8x = 8
  • y=3y = 3

Let me know if you'd like further clarification or have any additional questions!

Here are 5 related questions:

  1. What are the properties of vertical angles?
  2. How can you check the consistency of a system of linear equations?
  3. What happens when two lines intersect? Can you always find angle relationships?
  4. How do we know when two angles are supplementary or complementary?
  5. Can vertical angles be used to solve problems involving parallel lines?

Tip: When dealing with angles, it's helpful to remember that vertical angles are always equal, while adjacent angles on a straight line sum up to 180°.

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Math Problem Analysis

Mathematical Concepts

Algebra
Angle Relationships
Linear Equations

Formulas

Equation 1: 7x - 2 = 18y
Equation 2: 11x - 34 = 18y

Theorems

Vertical Angles Theorem
Linear Equations

Suitable Grade Level

Grades 8-10