No, 5(x-1) expands out to make 5x-5. So 5x-1 and 5x-5 aren’t equivalent.
You have a 1/2 chance of spinning an even number on the spinner, and a 1/2 chance of rolling an odd number on the die, 1/2 times 1/2 give you a 1/4 chance of doing both of those tasks.
Subtract that number down so its a