How do I use Cramer's rule to solve the system of equations #3x+4y=19# and #2x-y=9#?
1 Answer
Mar 1, 2015
The answer is:
Remembering that the derminant of a matrix
is:
First of all let's write the matrix of the coefficients:
and let's find the determinant:
Now let's find
so:
And now the same thing with the second column:
so:
And now the solution is: