Question

Numbers question?

Answer 1

`4.5` and `9.5`

Explanation:

You start by writing two equations, `x+y=13` and `x-y=4`. We know these as the two numbers added become `13` and when subtracted become `4`.

I worked with the second equation, adding the `y` to both sides to get `x=y+4`. I moved this new equation to the first equation, substituting the `y+4` for `x`.

I then had `(y+4) + y =13`.

Keeping the variables on one side and the numbers on the other, it results in `2y=9`. I divide by two on both sides.

This results in `y=4.5`. We then bring this new result back into the original second equation.

So now we have `x-4.5 = 4`. Add `4.5` to both sides, and we get `x = 9.5`.