Question

How do you solve the following system: `4x+y=-7, 2x + 3y = 8`?

Answer 1

`(-2.9,4.6)`

Explanation:

Rearrange the second equation to get:
`2x=8-3y`

Also:
`2(2x)+y=-7`
`2(8-3y)+y=-7`
`16-6y+y=-7`
`-5y=-23`
`y=23/5=4.6`

Now we put this in:
`4x+23/5=-7`
`4x=-7-23/5=(-35-23)/5=-58/5`
`x=-58/20=-2.9`

`(-2.9,4.6)`