Solve for x and y respectively$\begin{align}  & 2x-5y=9 \\ & 6x-4y=12 \\\end{align}$

Solve for x and yin the equation below$\begin{align}  & {{x}^{2}}-{{y}^{2}}=4 \\ & x+y=2 \\\end{align}$

Make n the subject of the formula if $w=\frac{v(2+cn)}{1-cn}$

Solve for x and y respectively in the simultaneous equations$\begin{align}  & -2x-5y=3 \\ & x+3y=0 \\\end{align}$

Solve for x and y if  x – y  = 2 and x² – y² = 8

Find the value of x and y respectively if $3x-5y+5=0$and $4x-7y+8=0$ 

Solve the equation ${{m}^{2}}+{{n}^{2}}=29,\text{  }m+n=7$