What is the solution to the following system using Cramer's Rule?

3x – 6y = –1
5x + 3y = 7

(1, 3)
(–1, 3)
(–1,2/3 )
(1, 2/3)

Question

What is the solution to the following system using Cramer's Rule?

3x – 6y = –1
5x + 3y = 7

(1, 3)
(–1, 3)
(–1,2/3 )
(1, 2/3)

amistre64 · Answer

well, the solution to the system will be the same regardless of the method; to just get the correct option, plug them into the equations to see what works out

anonymous · Answer

i tried, but i didnt get anything that worked.

anonymous · Answer

http://www.analyzemath.com/Tutorial-System-Equations/cramers_rule.html

amistre64 · Answer

3x – 6y = –1
1      3
3 - 18 .... not it


5x + 3y = 7
-1    3
-5 + 9 .... not it

anonymous · Answer

(1,2/3)Via Mathematica:$$\text{LinearSolve}\left[\left( \begin{array}{cc}  3 & -6 \  5 & 3 \end{array} \right),\left( \begin{array}{c}  -1 \  7 \end{array} \right)\right]=\left\{1,\frac{2}{3}\right\} $$

amistre64 · Answer

3x – 6y = –1
-1   2/3
-3 -4 ... not it


itll have to be the last one

5x + 3y = 7

anonymous · Answer

shana, to use cramers rule..  set up your matrix

anonymous · Answer

thanks!

amistre64 · Answer

3x – 6y = –1
1     2/3
 3 - 4   = -1


5x + 3y = 7
 1    2/3
 5      2  = 7

amistre64 · Answer

yep