Answer:
Hello!!! Princess Sakura here ^^
Explanation:
First you write out your inequality:

So first we will subtract 2b on both sides:

Since they both canceled out each other we are now left with

So anyways let's add 7 to both sides:

I know this might be confusing but the answer is all real numbers.
Tip: Real numbers are, in fact, pretty much any number that you can think of. This can include whole numbers or integers, fractions, rational numbers and irrational numbers.