Lian's work is shown below. Steps Lian's Work Step 1 s + 40 = 68 Step 2 s + 40 minus 40 = 68 minus 40 Step 3 s = 28 In which step, if any, did Lian first make a mistake in her work? step 1 step 2 step 3 no mistake

Step-by-step explanation:

Given the equation solved by Lian expressed as;

s  + 40 = 68

Lian is to find the value of s from the equation, to do that you will follow the steps below;

Step 1: Substract 40 from both sides of the equation;

s  + 40 - 40 = 68 - 40

Step 2: Solve for s;

s  + 40 - 40 = 68 - 40

s + 0 = 68 - 40

s = 28

Based on the calculation, we can say that Lian made no mistake when solving