Answer:
[tex]a = \frac{11}{12}[/tex]
Step-by-step explanation:
In order to find the value of a we just solve the equation as follows....
[tex]\frac{1}{3} + a = \frac{5}{4} \\[/tex]
[tex]a = \frac{5}{4} - \frac{1}{3}[/tex]
[tex]a = \frac{15}{12} - \frac{4}{12}[/tex]
[tex]a = \frac{11}{12}[/tex]
