help finding the solution Do Homework-ben barraza - Mocilla Firefow mathxl.com/s

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help finding the solution

Do Homework-ben barraza - Mocilla Firefow mathxl.com/student/PlayerHomeworkaspx?homeworkld-4672497178questionl Firefox p Math V12 TR SP17 Homework: Section 3.3 Homework My Li score: 0 of 1 pt O My C 3.3.13 47 of 10 (8 compl Cours Solve the system Assig Select the correct choice below and if necessary fill in the answer boxes to complete your choice O A. There is one solution. The solution set is (( O B. There are infinitely many solutions. The system is dependent Simplify your answers ) eText Chap! There is no solution Bitze Leam Stude click to select and enter your answers) and then ciwk Check Answer Tools All parts showing Multimedia Library Clear Al

Explanation / Answer

2x + y = -2

or, y = -2 - 2x

x + y - z = -8

or, -z = -8 - x - y

or, z = x + y + 8

Substitute the value of z in third equation

4x + 3y + x + y + 8 = 0

or, 5x + 4y + 8 = 0

or, 5x + 4(-2 - 2x) + 8 = 0

or, 5x - 8 - 8x + 8 = 0

or, -3x = 0

or, x = 0

y = -2 - 2 * 0 = -2

z = 0 - 2 + 8 = 6

So the solution set is (0, -2, 6)

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