Question

PLEASE HELP >?!

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

Answer 1

i belive that the answer is C

Answer 2

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

Explanation:

Given :7 + 2(x – 3) + 5x

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

Solution :

`7 + 2(x -3) + 5x`

`7 + 2x -6+ 5x`

`7-6+2x+ 5x`

`1+7x`

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