the two equations are
-2x -5y =21
9x -7y = -65
I have tried all methods and i keep getting different answers, could somebody help me?
$\displaystyle \left\{\begin{array}{ll}-2x-5y=21\\9x-7y=-65\end{array}\right.$
Multiply the first equation with 9 and the second with 2:
$\displaystyle \left\{\begin{array}{ll}-18x-45y=189\\18x-14y=-130\end{array}\right.$
Add the equations:
$\displaystyle -59y=59\Rightarrow y=-1$
Now plug y in any of the equations and find x.