Hello, this is my first time on this site and I need some help with a natural logarithm equation with one unknown.

13.14587 - 1.77412x - 3.74394x^2 = ln(2*x/a) - (4.6e^-6)*(x^2)/a

the x values i need to solve for are 0.6-1.2 in increments of 0.1

I need to solve for the value of a at each value of x.

Would someone be able to help me simply this equation to solve for a. Thank you very much