Answer:
y = x - 6
Explanation:
Let a number be y
x - y = 6
⇒y = x - 6
Now, it is not mentioned what type of numbers y and x are. So, the numbers could be real numbers, imaginary numbers.
Real numbers include
Natural numbers eg., 1, 2, 3 .......
Whole numbers eg., 0, 1, 2, 3 ......
Integers eg., .....-2, -1, 0, 1, 2 .....
Irrational numbers eg., π
Rational numbers eg., 4.0, 3.0, 3.1 ......