Math Problem Statement

Diketahui Matriks A = [ [2x, -3], [1, y - x] ], B = [ [10, -3], [1, -1] ]. Jika matriks A = B, tentukan nilai x dan y!

Solution

The given problem provides two matrices, AA and BB, and asks to find the values of xx and yy such that A=BA = B.

Matrix AA is: A=[2x31yx]A = \begin{bmatrix} 2x & -3 \\ 1 & y - x \end{bmatrix} Matrix BB is: B=[10311]B = \begin{bmatrix} 10 & -3 \\ 1 & -1 \end{bmatrix}

Since the two matrices are equal, corresponding elements must be the same.

  1. From the top left corner of the matrix: 2x=10x=102=52x = 10 \quad \Rightarrow \quad x = \frac{10}{2} = 5

  2. From the bottom right corner: yx=1y - x = -1 Substituting x=5x = 5 into the equation: y5=1y=4y - 5 = -1 \quad \Rightarrow \quad y = 4

Thus, the values are: x=5andy=4x = 5 \quad \text{and} \quad y = 4

Would you like more detailed steps or explanations?

Here are 5 related questions you might want to explore:

  1. How do you find the determinant of a 2x2 matrix?
  2. What happens if matrix ABA \neq B? How do you solve for unknowns?
  3. Can you solve for multiple variables in larger matrices?
  4. How are matrices used in solving systems of linear equations?
  5. What are the properties of matrix equality?

Tip: Always remember that two matrices are equal only if all corresponding elements are equal.

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Math Problem Analysis

Mathematical Concepts

Matrix Equality
Linear Equations
Algebra

Formulas

Matrix equality: corresponding elements must be equal

Theorems

Equality of Matrices

Suitable Grade Level

Grades 9-11