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3^x +1/3^x=10/3
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3^x +1/3^x=10/3 Related: CA Algebra I: Quadratic equation?
Given;
     3^x +1/3^x=10/3;
Take LCM on LHS  we get
    (3^(2x) +1)/3^x=10/3
Equating numerator & denominator on both sides we get
    3^(2x) + 1 = 10     eqn (1)
    3^x = 3     eqn (2)
By solving both the eqn's we get 
         X = 1.
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3^x +1/3^x=10/3 Related: CA Algebra I: Quadratic equation?
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