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Firdavs [7]
3 years ago
11

Please pls help a+12=21​

Mathematics
2 answers:
schepotkina [342]3 years ago
8 0

Answer:

Down Below

Step-by-step explanation:

a+12=21\\a+12-12=21-12\\a=9

Harrizon [31]3 years ago
7 0

Answer:

9

Step-by-step explanation:

a +12 = 21

a + 12 - 12 = 21 - 12

a = 9

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