Question

solve using Cramer's Rule only :

3x+4y-3z=5
3x-2y+4z=7
3x+2y-z=3

Answer 1

The rule is described here

http://www.purplemath.com/modules/cramers.htm

Answer 2

The system can be written in the form of a matrix like this:
\[\left[\begin{matrix}3 & 4 & 5 \\ 3 & -2 & 4 \\ 3 & 2 & -1\end{matrix}\right] \left[\begin{matrix}5 \\ 7 \\3\end{matrix}\right]\]

Confirm if this is understandable

Answer 3

yes can you please show me how to solve it step by step plz

Answer 4

hello, yes

So cramer's rule is being used to efficiently solve
for x, y or z

which one do you want to solve ?

Answer 5

x y and z

Answer 6

please and thank you

Answer 7

ok lets begin by solving X

so to use cramer's rule here, we simply replace all entries belonging to x variable with the solution vector. The first entry in each row is the one that is connected to x