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The expression 7 + 2(x – 3) + 5x is simplified correctly in the correct order. Which of the steps has an incorrect justification?


A. 7 + 2x - 6 + 5x
7 + 2x + (-6) + 5x

B. 7 + (-6) + 2x + 5x

C. 7 +(-6) + (2+5)x

D. 7 + (-6) + 7x
1 + 7x
7x + 1

Respuesta :

RICJCK
i belive that the answer is C

Answer:

Option C : 7 +(-6) + (2+5)x

Step-by-step explanation:

Given :7 + 2(x – 3) + 5x

To Find :Which of the steps has an incorrect justification?

Solution :

[tex]7 + 2(x -3) + 5x[/tex]

[tex]7 + 2x -6+ 5x[/tex]

[tex]7-6+2x+ 5x[/tex]

[tex]1+7x[/tex]

So, Option C has an incorrect justification: 7 +(-6) + (2+5)x

Like terms can be added easily there is no need to apply distributive property .

Hence Option C has an incorrect justification

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