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We just said that we can translate this inequality as the distance between x and
4 on a number line is less than 5. Let's mark 4. Try to use this number line to
visualize where you think x is allowed to lie. Considering what we know about
how far it can be from 4. Then write down the interval form of the solution, and
also the inequality form of the solutions for, for x. So again, first just
figure out the range of solution on the number line that you think x is allowed
to equal, and then just translate this into the 2 types of notation we know how
to use.