Question

how do i solve for x and y??? as shown in the attachment

Answer 1

Where is the attachment?

Answer 2

It's the Crammer's rule formula !

Answer 3

erm do i need to know linear algebra

Answer 4

@Chlorophyll

Answer 5

Double check your link, I don't see anything else except the formula!

Answer 6

\[\begin{cases}a_1x+b_1y=c_1\\ a_2x+b_2y=c_2\end{cases}\iff\left[\left.\begin{array}{ccc}a_1&b_1\\a_2&b_2\end{array}\right|\begin{array}{c}x\\y\end{array}\right]=\left[\begin{array}{c}c_1\\c_2\end{array}\right]\]