guadalupe8940
Answered

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THE SUM OF A NUMBER, X
AND 9 is 21.
SOLVE FOR X.

Sagot :

Answer:

X + 9 = 21

Isolate the variable, meaning getting rid of the constants

-9         -9

X = 12

Answer:

12

Step-by-step explanation:

To get the answer 12 you must:

Subtract 21 - 9

That would get you your answer.

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