Question

How do you solve this system of equations: `y+ 2y = - 1 and 4x + 5y = - 10`?

Answer 1

`x=-25/12` and `y=-1/3`

Explanation:

First we can find y by add y together in `y+2y=-1`
`3y=-1` and `y=-1/3`

Now we have `y=-1/3` so we can substitute it into `4x+5y=-10` to find x

`4x+5(-1/3)=-10`
`4x-5/3=-10`
`4x=-25/3`
`x=-25/12`
You can check the solution by substitute x and y the second equation