Respuesta :

yes it is! when u plug 3 into m, u can use PEMDAS to figure out the fact that the left side will equal the right side!
bruv21

Answer:

yes

Step-by-step explanation:

3=m

3(m + 1) = 12

3(3+ 1) = 12

3×3 + 3×1 =12

9 + 3 =12

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