Q: The equation 24 x 2 + 25 x − 47 a x − 2 = − 8 x − 3 − 53 a x − 2 is true for all values of x ≠ 2 a , where a is a constant. What is the value of a ? A: -3 --- Q: If 3 x − y = 12 , what is the value of 8 x 2 y ? A: Since the numerator and denominator of have a common base, this expression can be rewritten as 2 ( 3 x − y ) . In the question, it states that 3 x − y = 12 , so one can substitute 12 for the exponent, 3 x − y , which means that 8 x 2 y = 2 12 --- Q: If Logx (1 / 8) = - 3 / 2, then x is equal to... A: 4