Question

How do you solve `1 + X = 3`?

Answer 1

Subtract `color(red)(1)` from each side of the equation to solve for `X`:

`1 + X - color(red)(1) = 3 - color(red)(1)`

`1 - color(red)(1) + X = 2`

`0 + X = 2`

`X = 2`