$$4x=11-7y \Rightarrow x=\frac{11-7y}{4}$$
$$2x=5-3y \Rightarrow 2 \cdot \left( \frac{11-7y}{4} \right)=5-3y \Rightarrow \frac{11-7y}{2}=5-3y \\ \Rightarrow 11-7y=10-9y \Rightarrow 9y-7y=10-11 \Rightarrow 2y=1 \Rightarrow y=\frac{1}{2}$$
Also:
$$x=\frac{11-\frac{7}{2}}{4}=\frac{22-7}{8}=\frac{15}{8}$$