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28 February, 17:18

Burniece solved the following equation:

4x - 2x + 8 = 6 (x + 4)

Step

Work

Justification

1

2x + 8 = 6 (x + 4)

Combine like terms

2

2x + 8 = 6x + 24

Distributive property

3

-4x + 8 = 24

Subtraction property of equality

4

-4x = 16

Addition property of equality

5

x = - 4

Division property of equality

Which step has an incorrect justification?

Step 1

Step 2

Step 3

Step 4

+2
Answers (1)
  1. 1 March, 03:39
    0
    Step 4 has the incorrect justification.

    In order to isolate the x variable, she subtracts 8 from both sides making it another subtraction property of equality justification.
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