Looks like a system of equations will solve this.

X = one number

Y = another number

-----------------------------------

X - Y = 7

X = 2Y + 5

-------------------------------------Rearrange top equation.

X = 7 + y

--------------Insert into bottom equation.

7 + Y = 2Y +5

7 = Y + 5

**2 = Y**

=========Find X in top first equation ( X - Y = 7)

X - 2 = 7

**X = 9**

**======You have checked one equation, now check this original equation.**

**X = 2Y + 5**

**9 = 2(2) + 5**

**9 = 9**

**=======Checks and is consistent.**

**Y = 2**

**X = 9**