Question

How do you solve the system of equations `8x-5y = -17` and `-2x + y = 6`?

Answer 1

`x = -13/2 " " y = -7`

Explanation:

You have
1. `" " 8x−5y =−17`
2. `−2x+y= " "6` Multiple this function by 4 and add to the two functions
3. `" " 8x−5y =−17`
4. `−8x+4y= " "24`
`--------`
5. `" " 0−y = 7; y = -7` insert the value of y to any equation, let's use 2:

`" " -2x - 7 = 6; x = -13/2`

You can use a Matrix equation...