What is x- 2 1/2 = 6 3/4. pls help

"how does lena finally defeat the robots? ” this question will best be used to describe the story’s exposition. rising action. climax. falling action.

Acity plans to build a new rectangular-shaped park. the perimeter of the park will be 940 meters. the width of the park will be 300 meters. what will be the length, in meters, of the new park?

How is working backward similar to solving an equation?