Cramer's Rule Redux Exercises

Example 1

In the following system of equations, what's the value of D?

2x – 3y + 5z = 9
3x + y – 4z = 7
-x + 6y + z = 6

Hint

Remember the steps for finding the determinant: column trick, then plug and chug.

Example 2

Using the determinant from the previous question, solve this system of equations. Just for giggles, give your answers as decimals rounded to one decimal place.

2x – 3y + 5z = 9
3x + y – 4z = 7
-x + 6y + z = 6

Hint

Remember the steps for other determinants: remove the variables you're solving for, replace them with the constant values, column trick, then plug and chug. At the very end, divide your fraction answers to get clean-lookin' decimals for x, y, and z. You've got this.

Cramer's Rule Redux Exercises

Cramer's Rule Redux Exercises

Example 1

Example 2

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