When you have exponents with the same base and you divide them, you **subtract** the exponents.

So from what we’re given, we know that 2*x* – (*x* – *y*) = 1. We can solve that for *y*.

2*x* – (*x* – *y*) = 1

2*x* – *x* + *y* = 1

*x* + *y* = 1

*y* = 1 – *x*

from Tumblr https://ift.tt/2PAzwqC