[tex]2\frac{3}{4}a=19\frac{1}{4}[/tex][tex]\frac{8+\text{ 3}}{4}a=\frac{76+1}{4}\Longrightarrow\frac{11}{4}a=\frac{77}{4}\Longrightarrow11a=\frac{77\cdot4}{4}=77\Longrightarrow11a\text{ = 77}\Longrightarrow\text{ a = }\frac{77}{11}=\text{ 7 }\Longrightarrow\text{ a = 7}[/tex]
Answer:
a = 7
