Answer:
7(M+5)=21
or, 7M+35=21
or, 7M=21-35
or, 7M=-14
or,M=-14/7
or, M=-2
M = -2
Step-by-step explanation:
7 (M + 5) = 21
7M + 35 = 21
7M = 21 - 35
7M = -14
M = -14/7