Question

Corey thinks of a number. He adds 25 to it then halves the result. Then he subtracts 17 and multiplies the result by 3. His final answer is 18.

Answer 1

You just have to do the opposite of what he did.
So (18 ÷3 +17) ×2 -25 

The final answer is 21

Answer 2

You just have to do the opposite of what Corey did.
So (18 ÷3 +17) ×2 -25

The answer is 21

Hope I can help you, brainliest answer? :)