Question attached , need help~ thx for answering ~

kindly stay away if u don't know the ans :) ~

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

What are “like terms”? why can we only add like terms?

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.