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

User Mpjdem
by
7.8k points

2 Answers

7 votes
-19n+9 is the right answer just group them together it make it easier on you 
User Floriankapaun
by
6.6k points
3 votes
Use symbol lab for this it'll save a lot of your time
User DolDurma
by
6.7k points
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