Question:

Let f $($x$)=$ Cax $+$ k

Suppose that the fonction f $($x$)$ is such that:

has a horizontal asymptote at y $=66,$

crosses the y$-$axis at $-3$ and

passes through the point $(6,5).$

Find the value of x such that f $($x$)=26.$

Note: Your answer must be written in decimal with EXACT $3$ decimal places of precision.