Question

How do you solve using linear combination: 3x-y=4, 2x+y=6?

Answer 1

`x=y=2`

Explanation:

We have `3x-y=4`, and `2x+y=6`

If we add these equation 2gether:

`3x-y+2x+y=10`

`5x=10,` and clearly, `x=2`

We substitute the value back in the equations to find `y`, and clearly, `y=2`.