What subtract what equals 123?

To find two numbers where one subtracts the other to equal 123, you can express it as ( x - y = 123 ). For example, if you let ( y = 0 ), then ( x ) would equal 123. Alternatively, if ( x = 200 ), then ( y ) would be ( 200 - 123 = 77 ). There are infinitely many pairs of numbers that satisfy this equation.