How can i do x+5=8? because i don’t get it steps and how can i do it?

Aline passes through 3,7 and 6,9 what equation represents the line

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?