penyelesaian dari x/2 -y/4-7/4 dan x/4+y/3=9/4 adalah?

[tex] \frac{x}{2} - \frac{y}{4} - \frac{7}{4} \\ \frac{4x}{2} - \frac{4y}{4} - \frac{28}{4} \\ 2x - y - 7 \\ \\ \frac{x}{4} + \frac{y}{3} = \frac{9}{4} \\ \frac{x}{4} + \frac{y}{3} - \frac{9}{4} \\ \frac{12x}{4} + \frac{12y}{3} - \frac{108}{4} \\ 3x + 4y - 27 [/tex]
#maaf kalau salah