Let S denote the set of all real numbers except -1. Define the binary operation '' on S as a b = a + b + ab. Then the solution of the equation
2* x * 3 = 7 is
1
\(-\frac{1}{3}\)
2
\(-\frac{1}{2}\)
3
\(\frac{7}{5}\)
4
\(\frac{7}{6}\)
Let S denote the set of all real numbers except -1. Define the binary operation '' on S as a b = a + b + ab. Then the solution of the equation
2* x * 3 = 7 is