Wendy was asked to write an equation and solve this problem. Dylan bought a box of markers. He used 14 markers and had 18 that he didn’t use. How many markers were in the box? Wendy’s work is shown below. Steps Wendy’s Work Step 1 m minus 14 = 18 Step 2 m minus 14 minus 14 = 18 minus 14 Step 3 m = 4 In which step, if any, did Wendy first make a mistake in her work? step 1 step 2 step 3 no mistake
