To solve this inequality, you want to start with distributing the 2 on the right side. When you do this, you get 15>2d+36-17 because you have to multiply the 2 by d and by 18.
The next step is to combine like terms on the right side. This means that you would have to subtract 17 from 36 and get 19. The inequality is now 15>2d+19.
Next, you need to look at your signs on the right side. You must move the 19 over to the left side, and you would do this by subtracting the 19 from the 15. You would subtract because the 17 is negative. An easy way to remember when you subtract and when you add is simple. You always do the opposite of what the sign of you number is. For example, if I had a -19, I would add it, but if I had a 89, I would subtract.
Your inequality is now -4> 2d.
You always move the numbers with the variable last. In this case, we have a positive 2 with the d. The 2 is being multiplied by the d, so therefore we would divide the -4 by 2. This gives you the final answer of -2>d.