Substitution Method Practice

1. Solve the system of equations.

   $\begin{aligned}& 12x-5y = -20\\\\& y=x+4\end{aligned}$

   $x=$_______

   $y=$_______

2. Solve the system of equations.

   $\begin{aligned}& 13x-6y = 22\\\\& x=y+6\end{aligned}$

   $x=$_______

   $y=$_______

3. Solve the system of equations.

   $\begin{aligned}& -4x+7y = 20\\\\& y=3x+15\end{aligned}$

   $x=$_______

   $y=$_______

4. Solve the system of equations.

   $\begin{aligned}& 6x-5y = 15\\\\& x=y+3\end{aligned}$

   $x=$_______

   $y=$_______

Source: Khan Academy, https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:solving-systems-of-equations-with-substitution/e/systems_of_equations_with_substitution
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