Question

Two numbers are taken and added. Now from the sum, if twice of the second number is subtracted, then which of the following represents the correct unchanging relation?

• A. x+2y
• B. x-2y
• C. x-y
• D. x+y

Answer 1

The correct option is C

x-y

Let the first number be $x$

and second number be $y$.

Sum of the numbers $=x+y$

Now, twice of the second number is subtracted from the sum as
$(x+y)-2y=x+y-2y=x-y$