Question:
Adler and Erika solved the same equation using the calculations below.
Adler’s Work



Erika’s Work



Which statement is true about their work?
Answer:
Both Adler and Erika solved for k correctly because either the addition property of equality or the subtraction property of equality can be used to solve for k.
Explanation:
Given

Required
What is true about Adler and Erika's workings
Analyzing Adler's work;

Adler subtracted 1/2 from both sides

Solving the expression on the left-hand side

Solving the expression on the right-hand side

Hence:

So, Adler's workings is correct
Analyzing Erika's work;

Erika added -1/2 to both sides

Solving the expression on the left-hand side

Solving the expression on the right-hand side

Hence:

So, Erika's workings is correct
Both workings are correct