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g100num [7]
4 years ago
13

Select the correct answer.

Mathematics
2 answers:
geniusboy [140]4 years ago
4 0

Pretty sure it's C. The division property of equality.

Because on the last step, you divide 9d by 9, to get d. And you also have to divide the other side by 9.

sergij07 [2.7K]4 years ago
4 0

Answer:

D.

the addition property of equality

Step-by-step explanation:

Given the expression in

Step 2: 9d - 5 = -15

The addition property of equality was used to get step 3.

That is

9d - 5 = -15

Move -5 over the equality sign and it becomes +5

9d = -15 + 5

9d = -10

OR add 5 to both sides of the equation as shown below

9d - 5 +5 = -15 + 5

9d = -10 which we have in step 3

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