Question

What is the justification for step 3 in the solution process?

0.8a − 0.1a = a − 2.5
Step 1: 0.7a = a − 2.5
Step 2: -0.3a = -2.5
Step 3: a = 8.3


A.
the division property of equality
B.
the addition property of equality
C.
the subtraction property of equality
D.
combining like terms

Answer 1

Answer: A

Explanation:

Answer 2

Letter A

Explanation:

The justification for step 3 in the solution process is the subtraction property of equality. This property states that if two numbers are subtracted from each other on both sides of an equation, the two sides remain equal. In this case, step 3 is subtracting -0.3a from both sides of the equation, which results in a = 8.3.