One and Two Step Equations

Which of the following is an equation? Options:

8z

8z - 5

8z = 2

8 divided by x

x + 9 = 21

x - 8 = -5

42 = 7f

Robyn had some video games then bought 4 more. Now she has a total of 10 games. What equation matches this situation?

Translate: Five more than a number

Translate: Four times a number plus six IS 30.

Sally had 10 peaches left at her roadside fruit stand. She went to the orchard and picked more peaches to stock up the stand. There are now 73 peaches at the stand. Write an equation that could be used to find how many peaches she picked.

Undo the addition in the equation: $$5x+4=-16$$ . Options: $$5x = 12$$ , $$5x = -20$$ , $$4x = 11$$ , $$4x = -21$$ .