Select all the expressions that are equivalent to - 6 (3x - 7). - 18x - 7 4 - 10 (3x - 7) 4 (3x + 5) - 2 (15x - 11) 6 (3x + 7) 2x - 7 - 5 (4x - 7) - 2 (9x - 21)

Step-by-step explanation:

Things to know

-*-=+

-*+=-

+*-=-

+*+=+

Generally to opening the bracket of the given format

a (b+c). Using distributive law

(a*b) + (a*c)

an+ac

1. - 6 (3x-7)

Opening the bracket

-18x+42

2. - 18x - 7

This is already simplify no need to simplify it.

3. 4 - 10 (3x - 7)

Opening the bracket

4-30x+70

-30x+74

4. 4 (3x + 5)

Opening the bracket

12x+20

5. - 2 (15x - 11)

Opening the bracket

-30x+22

6. 6 (3x + 7)

Opening the bracket

18x+42

7. 2x - 7

This is already simplified

8. - 5 (4x - 7)

Opening the bracket

-20x+35

9. - 2 (9x - 21)

Opening the bracket

-18x+42

Only the number 9 is equal to number 1 given.