Answer:
![x = y - 7](https://tex.z-dn.net/?f=x%20%3D%20y%20-%207)
Step-by-step explanation:
1. Create an equation
<em><u>Concept</u></em> :
If x = 5, then subtracting 5 from both sides gives you x - 5 = 0. Do this to both variables
If x - 5 = 0 and y - 12 = 0, those two statements equal the same thing. So
![x - 5 = y - 12](https://tex.z-dn.net/?f=x%20-%205%20%3D%20y%20-%2012)
2. Add 5 to both sides to isolate variable X
![x = y - 7](https://tex.z-dn.net/?f=x%20%3D%20y%20%20-%20%207)
3. (Optional) Plug given values into new equation to check answers
![(5) = (12) - 7](https://tex.z-dn.net/?f=%285%29%20%3D%20%2812%29%20-%207)
5 = 5 is a true statement