Question

Solve the linear system using the Gauss-Jordan elimination method.
-0.3x - 0.8y= -9
0.6x -1.4y= -15
The solution of the system is x= ___, y=____

Answer 1

- 0.3x - 0.8y = -9
0.6x - 1.4y = -15

2(-0.3x - 0.8y = -9)
0.6x - 1.4y = -15

-0.6x - 1.6y = -18
0.6x - 1.4y = -15

Add the two systems

0x - 3.0y = -33

-3.0y = -33

y = -33 / -3.0

y = 11

Now substitute y in for x in either of your equations in the system and solve for x.

Answer 2

What is the system for x?

Answer 3

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