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SSSSS [86.1K]
3 years ago
12

Help please. 1.) 12x+9x+15x 2.) 7n+28-21m

Mathematics
2 answers:
alexgriva [62]3 years ago
6 0
1. 36x
2.-14nm + 28
Like terms
mixas84 [53]3 years ago
4 0

Answer:     1. 36x        2.− 21 m + 7 n + 28

Step-by-step explanation:

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