SSC Government Jobs Exams Numerical Ability Algebra

If a2(a Suare)+b2+c2+3=2(a-b-c), then the value of 2a-b+c is ?

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a^2+b^2+c^2+3=2(a-b-c),
then a=1,
b=c=-1, then
2a-b+c = 2*1 -(-1)+(-1)= 2+1-1=2
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