Question

How do you solve the simultaneous equations `x + y = 3` and `x + 2y = 5`?

Answer 1

I found:
`x=1`
`y=2`

Explanation:

You can collect `x` from the first equation and substitute into the second:
`x=3-y` into the second:
`color (red)(3-y)+2y=5`
Solve for `y`:
`y=2`
Substitute this value into the first equation:
`x=3-color(red)(2)=1`