[tex]\frac{p}{7a-14} +\frac{1}{2-a} =[/tex]

[tex]=\frac{p}{7(a-2)} -\frac{1}{a-2} =[/tex]

[tex]=\frac{p}{7(a-2)} -\frac{7}{7(a-2)} =[/tex]

[tex]=\frac{p-7}{7(a-2)}[/tex]