a+b+c=?
Algebra
Level
2
ab + bc=130
bc + ca=168
ca + ab=228
FIND THE VALUE OF a+b+c FROM THE GIVEN SET OF EQUATIONS.
The answer is 31.
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1 solution
ab+bc+ca=263 so ca = 133, ab = 95, bc=35 hence abc = 665 now a = 19, b= 5, c=7 and a+b+c =31