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zhannawk [14.2K]
4 years ago
5

9 - 12n 2 + 4n 3 - 7n

Mathematics
2 answers:
Kryger [21]4 years ago
8 0
Use symbol lab for this it'll save a lot of your time
Leni [432]4 years ago
4 0
-19n+9 is the right answer just group them together it make it easier on you 
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