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snow_lady [41]
3 years ago
6

!GIVING BRAINLIEST!

Mathematics
2 answers:
ss7ja [257]3 years ago
8 0
It’s 4.05


12.9+4.05+4.05=21
sweet [91]3 years ago
6 0

Answer:

4.05+4.05+12.9=21

Step-by-step explanation:

Take 21 subtract 12.9 first, then you take the leftover number which is 8.1 then divide it by 2 giving you 4.05.

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