[tex] \frac{1}{2} a - 1 \frac{1}{4} = 2 \frac{3}{4} \\ \frac{1}{2} a = 2 \frac{3}{4} + 1 \frac{1}{4} \\ \frac{1}{2} a = 3 \frac{4}{4} \\ \frac{1}{2} a = 4 \\ a = 2[/tex]
Pozdrowionka! ~Wika
