Giải hệ phương trình

giải hệ phương trình

1)$\left\{\begin{array}{l}2\mathrm{x}+3\mathrm{y}=5\\ 4\mathrm{x}-\mathrm{y}=3\end{array}\right.$

2)$\left\{\begin{array}{l}x+y=360\\ 112\%x+100\%y=40\end{array}\right.$

3)$\left\{\begin{array}{l}5\mathrm{x}+3\mathrm{y}=13\\ 3\mathrm{x}-2\mathrm{y}=4\end{array}\right.$

4)$\left\{\begin{array}{l}\mathrm{x}-\mathrm{y}=2\\ {\mathrm{x}}^2-{\mathrm{y}}^2=10\end{array}\right.$

5)$\left\{\begin{array}{l}4\mathrm{x}-\mathrm{y}=1\\ {\mathrm{x}}^2+3{\mathrm{y}}^2=28\end{array}\right.$

6)$\left\{\begin{array}{l}\mathrm{x}-\mathrm{y}=\frac{8}{3}\\ 15\mathrm{x}=25\end{array}\right.$

7) $\left\{\begin{array}{l}\left(\mathrm{x}-3\right)·\left(\mathrm{y}+2\right)=\mathrm{xy}-5\\ (x+2).(y-3)=xy+1\end{array}\right.$

8)$\left\{\begin{array}{l}\frac{108}{\mathrm{x}}-\frac{63}{\mathrm{y}}=7\\ \frac{81}{\mathrm{x}}-\frac{84}{\mathrm{y}}=7\end{array}\right.$

9) $\left\{\begin{array}{l}\frac{1}{2\mathrm{x}-1}+\frac{4}{\mathrm{y}+5}=3\\ \frac{3}{2\mathrm{x}-1}-\frac{2}{\mathrm{y}+5}=-5\end{array}\right.$

Mng giúp mình câu 2,5,6,7,8,9 cũng đc ạ :((