Verified Answer :

2m + 4 (m — 3) = 7m — 4
2m + 4m - 12 = 7m - 4
6m - 12 = 7m - 4
-6m         -6m

-12 = x - 4
+4        +4

-12 + 4 = x
x = -8

This has one solution. 

Answer: One solution 

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