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If a+b = 8, b+c = -3, and a+c = -5 +b, what is the value of the product abc?

 Jan 9, 2022
 #1
avatar+675 
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a * b * c = -2660/27

 Jan 9, 2022
 #2
avatar+361 
+1

My shot: 

\(2a+2b+2c=b\)

\(a+b+c=\frac{b}{2}\)

\(-\frac{b}{2}=-5+b\)

\(-5=-\frac{3b}{2}\)

\(-10=3b\)

\(b=-\frac{10}{3}\)

\(a=\frac{34}{3}\)

\(c=-\frac{59}{3}\)

\(a\times b\times c=\frac{20060}{9}\)

huh, straight we got different answers......

 Jan 9, 2022

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