Cramer's Rule #7

Cramer's Rule is a lot easier to use when finding the determinant of each variable. In order to find each determinant, first find the common determinant. Then, substitute the solutions given for the first column and solve for the determinant. Next, substitute the solutions given for the second column and change the first back to its original numbers and solve for the determinant. To find the determinant of X, put the first determinant you found over the common determinant. To find the determinant of Y, out the second determinant you found over the common determinant.