Question

How do you solve the system of equations: x - 3y - 4 = 0 and x + 2y - 4 = 0?

Answer 1

I fond:
`x=4`
`y=0`

Explanation:

You can multiply the second equation by `-1` and add together the two equations in columns):
`{(x-3y-4=0),(color(red)(-x-2y+4=0)):}` add them:
`0-5y+0=0`
`y=0` substitute bach into the first:
`x-0-4=0`
`x=4`