Answer :

Answer:

x=7

Step-by-step explanation:

21=3(2x - 10) +9

21=6x -30 +9

21= 6x -21

6x=42

x=7

oladejotheophilus

Answer:

The answer is : 7

Step-by-step explanation:

21=3(2x-10)+9​

21 = 6x - 30 + 9

21 = 6x - 21

6x = 21 + 21

6x = 42

x = 42/6

x = 7

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