I need help taking an equation that calculates the voltage based on the sccm leak rate from a flow sensor and work it to do the opposite so I can program my macro.

y=a+(b*X)+(c*X^2)+(d*X^3)+(e*X^4)+(f*X^5)
a = 1.11E+00
b = 1.79E-02
c = -4.84E-05
d = 8.14E-08
e = -7.15E-11
f = 2.45E-14
x = 25
result when x is 25 = 1.528
Need equation to solve for x when y is known
Help, it has been 10 years since I had to do this!

Question

I need help taking an equation that calculates the voltage based on the sccm leak rate from a flow sensor and work it to do the opposite so I can program my macro.

y=a+(b*X)+(c*X^2)+(d*X^3)+(e*X^4)+(f*X^5)
a = 1.11E+00
b = 1.79E-02
c = -4.84E-05
d = 8.14E-08
e = -7.15E-11
f = 2.45E-14
x = 25
result when x is 25 = 1.528
Need equation to solve for x when y is known
Help, it has been 10 years since I had to do this!