Question

Think of a number. Multiply it by 2. Add 4 to the result. Subtract y from this result. What is the result?

Answer 1

2x+4-y. Let us assume the number I think is x. Multiply it by 2, result is 2x. Add 4 to it. It becomes 2x+4. Now subtract y from it. Hence the result is 2x+4-y