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natali 33 [55]
4 years ago
9

Can someone please help me?

Mathematics
1 answer:
Nookie1986 [14]4 years ago
8 0

Answer:

-3 • (x - 7)

Step  1  :

6x -  3 • (3x - 7)

Step 2:

21 - 3x  =   -3 • (x - 7)

Final result :

-3 • (x - 7)

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