8.515

√27+√75+√105-√243= 3√3+5√3+√105-9√3=√105-√3=10.247-1.732=8.515

If log 2 + log (3x + 1) = log (2x - 9) + 2, then what is the value of x? Note : Assume all log represented above is to the base of 10.