(5y-1)22^x = 13 - 15y\Rightarrow 5y\cdot 22^x - 22^x=13-15y\Rightarrow 5y\cdot 22^x+15y=13+22^x \Rightarrow\\
5y(22^x+3)=13+22^x\Rightarrow 5y=\frac{13+22^x}{3+22^x}\Rightarrow y=\frac{13+22^x}{15+5\cdot 22^x}