Question

Please check answers! I am providing the work I did.

#1. 3a+12-6a=-9
-9a+12 =-9
-9-12+ 3
9a=3
a=3

#2. 2m + 8 - 4m = 28
-2m + 8 = 28
28-8 = 20
-2m = 20
m=-5

#3. 78=3c+12-c+4
78=2c +16
78-16=62
2c=62
62/2c
c=31

Answer 1

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