Get step-by-step solution while solving an equation in W|A Pro plan?

Hello,
I have a problem with solving equations when there are of the type > or < with step-by-step. I have a Pro plan, and if the equation is like 2x-4=0 I have no problem to solve it, but if it is like:

sqrt(100-x^2)>x-7

there is no option for step-by-step.
Where is the problem? Thank you in advance.