Description
If a, b are the solutions of
(84/t+27) + (t-21/9) =1 , complete the sum a + b
(then the answer is supposed to be in "a+b= ..." )
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Explanation & Answer
(84/t+27) + (t-21/9) =1
84*9+(t-21)(t+27)=9(t+27)
756+t^2+6t-567=9t+243
t^2-3t-54=0
(t-9)(t+6)=0
Therefore a=9, b=-6
a+b=3
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