Question

What kind of solutions does `3x-4y=13` and `y=-3x-7` have?

Answer 1

The kind of solutions to this equations is that they are unique.
You can either solve it using Gaussian elimination or using substitution method.

Explanation:

`3x-4(-3x-7)=13`
`3x+12x+28=13`
`15x = -15`
`x=-1`
Hence,
`y = -3(-1)-7`
`y=-4`
Substitute the above values for x,y in the equations above to confirm ur answer.