Westonci.ca is your trusted source for finding answers to all your questions. Ask, explore, and learn with our expert community. Ask your questions and receive accurate answers from professionals with extensive experience in various fields on our platform. Join our Q&A platform to connect with experts dedicated to providing accurate answers to your questions in various fields.

For what value of x and y is the matrix equation [y 8x] = [15+x 2y] true?

Sagot :

In order to find the values of x and y so the matrix equation is true, we need to equate each corresponding elements of the matrices. So we have that:

[tex]\begin{gathered} \begin{bmatrix}{y} \\ {8x}\end{bmatrix}=\begin{bmatrix}{15+x} \\ {2y}\end{bmatrix} \\ \mleft\{\begin{aligned}y=15+x \\ 8x=2y\text{ }\end{aligned}\mright. \end{gathered}[/tex]

Using the value of y from the first equation in the second one, we have:

[tex]\begin{gathered} 8x=2(15+x) \\ 8x=30+2x \\ 8x-2x=30 \\ 6x=30 \\ x=\frac{30}{6}=5 \end{gathered}[/tex]

Finding the value of y, we have:

[tex]\begin{gathered} y=15+x \\ y=15+5 \\ y=20 \end{gathered}[/tex]

So we have that x = 5 and y = 20.