Question

a volunteer made $m$ muffins for a bake sale. after selling 28 muffins, 21 muffins remained. the equation $m - 28 = 21$ represents the situation. what is the first step in writing an equivalent equation to solve $m - 28 = 21$?

Explanation:

Step1: Add 28 to both sides

$m - 28 + 28 = 21 + 28$

Step2: Simplify to solve for m

$m = 49$

Answer:

The first step is to add 28 to both sides of the equation, and the total number of muffins made is $m=49$.