Question

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

10d − 5 = 4d − 15 − 3d
Step 1: 10d − 5 = d − 15
Step 2: 9d − 5 = -15
Step 3: 9d = -10
A.
the addition property of equality
B.
the division property of equality
C.
the subtraction property of equality
D.
the multiplication property of equality

Answer 1

[AI-generated answer — Bot GPT 3.5]

C. the subtraction property of equality

In step 3, both sides of the equation were subtracted by 5 to isolate the variable term. This is an application of the subtraction property of equality, which allows you to subtract the same number from both sides of an equation without changing the equality.