Question

Use Cramer's rule to solve the system of equations.

Answer 1

.-.

Answer 2

oh my goodness

Answer 3

wut

Answer 4

why are you on cramers rule =.= u gotta first learn how to solve equations properly

Answer 5

i know i know.. ive no choice.. or time for that

Answer 6

YES U DOOOooo thsi is gonna hurt u if u dont catch up right now

Answer 7

i tried it but it makes me want to put 9000 bullets in my head

Answer 8

https://www.youtube.com/watch?v=TtxVGMWXMSE

Answer 9

oh man..

Answer 10

this is horror

Answer 11

Here is Cramer's rule for 2 and 3 unknowns:
http://www.1728.org/cramer.htm

Answer 12

i give you one example
ax+by=p
cx+dy=q
let us write in matrix form.
\[\left[\begin{matrix}a & b \\ c & d\end{matrix}\right]\left(\begin{matrix}x \\ y\end{matrix}\right)=\left(\begin{matrix}p \\ q\end{matrix}\right)\]
AX=Z
\[where ~A=\left[\begin{matrix}a & b \\ c & d\end{matrix}\right]\]
\[X=\left(\begin{matrix}x \\ y\end{matrix}\right)\]
\[Z=\left(\begin{matrix}p \\ q\end{matrix}\right)\]
\[\left| A \right|= \left|\begin{matrix}a & b \\ c & d\end{matrix}\right| =ad-bc \neq 0\]
\[A _{1}=\left|\begin{matrix}p & b \\ q & d\end{matrix}\right|=pd-qb\]
\[A _{2}=\left|\begin{matrix}a & p \\ c & q\end{matrix}\right|=aq-cp\]
\[x=\frac{ A _{1} }{ \left| A \right| }=\frac{ pd-qb }{ ad-bc }\]
\[y=\frac{ A _{2} }{ \left| A \right| }=\frac{ aq-cp }{ ad-bc }\]