Resolver el siguiente sistema de ecuaciones. $$ \begin{array}{l}2 x-9 y=-11 \ -8 x+7 y=15\end{array} $$ \begin{tabular}{|l}$$ x=\square $$\end{tabular}

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Solve the system of equations $$ 2x-9y=-11;-8x+7y=15 $$.
Solve the system of equations by following steps:
- step0: Solve using the substitution method:
  $$\left\{ \begin{array}{l}2x-9y=-11\-8x+7y=15\end{array}ight.$$
- step1: Solve the equation:
  $$\left\{ \begin{array}{l}x=\frac{-11+9y}{2}\-8x+7y=15\end{array}ight.$$
- step2: Substitute the value of $$x:$$
  $$-8	imes \frac{-11+9y}{2}+7y=15$$
- step3: Simplify:
  $$44-29y=15$$
- step4: Move the constant to the right side:
  $$-29y=15-44$$
- step5: Subtract the numbers:
  $$-29y=-29$$
- step6: Change the signs:
  $$29y=29$$
- step7: Divide both sides:
  $$\frac{29y}{29}=\frac{29}{29}$$
- step8: Divide the numbers:
  $$y=1$$
- step9: Substitute the value of $$y:$$
  $$x=\frac{-11+9	imes 1}{2}$$
- step10: Substitute back:
  $$x=\frac{-11+9}{2}$$
- step11: Calculate:
  $$x=-1$$
- step12: Calculate:
  $$\left\{ \begin{array}{l}x=-1\y=1\end{array}ight.$$
- step13: Check the solution:
  $$\left\{ \begin{array}{l}x=-1\y=1\end{array}ight.$$
- step14: Rewrite:
  $$\left(x,yight) = \left(-1,1ight)$$
La solución del sistema de ecuaciones es $$ x = -1 $$ y $$ y = 1 $$.
La solución es $$ x = -1 $$.

Resolver el siguiente sistema de ecuaciones.

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