SOLUTION: a+b+c=12 a=5b a+c=9

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Question 254012: a+b+c=12
a=5b
a+c=9
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
a+b+c=12
a=5b
a+c=9
.
c=9-a
c=9-5b since a=5b
.
5b+b+9-5b=12
b+9=12
b=3
a=15
c=-6
.
Ed