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Answer :

Answer:

x= 13

Step-by-step explanation:

x + 8 = 21

x + 8-8 = 21-8

x = 13

Answer: Im not sure I understand, do you want the answer to the question?? If you do then the answer is x=13

Step-by-step explanation:

x+8=21

-8     -8

x=13