I have two lines one linear (y=mx+c) and one exponential (y=c^bx) and
they intercept each other. I believe it is possible to calculate where
the lines intercept. Although I can do this by graphing the data, it
takes time and allows for user error so a calculation would speed
things along greatly.

The problem:

So for the first line using the equation y=mx+c the numbers for the
13kPa line are y=0.0021x+9e-16

And for the exponential line (y=c^bx) which we produce to using the
myograph is y=0.0022^0.0046x (^=Exp)

I know that the two lines intercept at 1613. But no matter what I try
I can't get the equations to simplify and produce a x value.