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anygoal [31]
3 years ago
8

The sum of a number and twelve is twenty-one. What is the number? 21 n 12 8 9 10 33

Mathematics
2 answers:
Sonbull [250]3 years ago
4 0

Answer:

9

Step-by-step explanation:

Subtract 1 2 12 12 from both sides of the equation + 1 2 = 2 1 + 1 2 − 1 2 = 2 1 − 1 2 2 Simplify Solution = 9

UkoKoshka [18]3 years ago
3 0

Answer:

9+12=21

Step-by-step explanation:

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Answer:

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