Question

How do you solve the following linear system `x-3y= 9, 7x+2y=-3`?

Answer 1

`x=-66/23,y=405/23`

Explanation:

Multiplying the first equation by`-7` and adding to the second we get
`23y=-66` so
`y=-66/23`
plugging this into the first equation:
`x=9+3*66/23=(9*23+3*66)/23=405/23`