(Adding and Subtracting Linear Expressions HC)
Margie's work for adding linear expressions is shown below. After checking her answer with the answer key
Given (-2.67b+ 11)-(5.38b-15)
Step 1 -2.67b + 11 + (-5.38b) + 15
Step 2 -2.67b + 5.38b+ 11 + 15
Step 3
(-2.67b+ 5.38b) + (11 + 15)
Step 4 2.71b + 26
Part A: Identify and explain the first step where Margie made an error. (2 points)
Part B: Explain how to correctly write the expression in fewest terms by correcting the error in Part A.