Tolobg ya.. no.13,trima kasih semua : ) : )

[tex] \frac{13}{2} = 3( \frac{5}{4} ) + x \\ \frac{13}{2} - \frac{15}{4} = x \\ \frac{26}{4} - \frac{15}{4} = x \\ \frac{11}{4} = x \\ 2 \frac{3}{4} [/tex]