Question

How do you solve the following system: `3x – y = 28 , 4x + y = 2`?

Answer 1

Solution is `x=30/7` and `y=-106/7`

Explanation:

Just adding the two equations `3x–y=28` and `4x+y=2`

gives us `7x=30` or `x=30/7`.

Putting this in second equation, we get

`4*30/7+y=2` or `y=2-120/7=-106/7`

Hence solution is `x=30/7` and `y=-106/7`.