The sum of a number and 19 has the same value as one less than the product of that number and five in equation form.

x + 19 = (x * 5) - 1

Step-by-step explanation:

The first part is pretty easy, you just take a number, x (or whatever variable), and 19 and you are adding them so you would put x + 19. Then, it says a the product of a number and 5 so that means x * 5. It also says one less than the products of that number and 5 so you would subtract 1 from that expression. You can see that it says has the same value as and that means equal to.

Sorry if my explanation is weird and doesn't make sense. I'm pretty sure my answer is right though.