Write the absolute value equations in the form x−b =c (where b is a number and c can be either number or an expression) that have the following solution sets: All numbers such that x≤−14. Please need help quickly

Can someone show me the steps to solve the problem?

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

The measure of an angle is 117°. what is the measure of a supplementary angle?