Metode Substitusi

Persamaan (1)

\begin{equation*}
\begin{split}
2x+ y & = 5 \\\\
y & = 5 - 2x
\end{split}
\end{equation*}

Subsitusi \(y = 5 - 2x\) ke persamaan (2)

\begin{equation*}
\begin{split}
4x + 3y & = 13\\\\
4x + 3(5 - 2x) & = 13 \\\\
4x + 15 - 6x & = 13 \\\\
-2x & = 13 - 15 \\\\
-2x & = - 2 \\\\
x & = 1
\end{split}
\end{equation*}

Substitusi nilai \(x = 1\) ke persamaan (1) atau (2)

\begin{equation*}
\begin{split}
2x+ y & = 5 \\\\
2(1) + y & = 5 \\\\
y & = 3
\end{split}
\end{equation*}

\(x = 1\) dan \(y = 3\)