Question

How do you solve the system of equations: x+y=2 and 2x-y=0?

Answer 1

I found:
`x=2/3`
`y=4/3`

Explanation:

You can add together the two equations (in columns) to get:
`{(x+y=2),(2x-y=0):}`
`3x+0=2`
So `x=2/3`
substitute back into the second equation:
`2*2/3-y=0`
`y=4/3`