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Anonymous
9m-2d
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It is: 4m+5
4m+9+5m-12=42 9m=45 m=5
It can be simplified to: 4m-2n
3k+4m+2
6m + 7 - 2m + 1 = 4m + 8 If you meant: (6m + 7) - (2m + 1) = 4m + 6