SOLUTION: Use Cramer's Rule to solve the system. 6x+12y=33 4x+7y=20

Question 136141: Use Cramer's Rule to solve the system.
6x+12y=33
4x+7y=20

Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

You need to create three 2X2 matrices of the form

and the value of this matrix is:

The first has the coefficients of the variables:

. Use the formula above to calculate the value of D

The second matrix is the same as the first with the 1st column replaced by constant values on the right side of your equations.

. Use the formula above to calculate the value of

is the same process, but replace the 2nd column with the constant values. Use the formula above to calculate the value of

Then Cramer's Rule says:

-- if the system is independent. If ,, or = 0, Cramer's Rule doesn't work.
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