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yet more linear equations

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Dan Buch 2012-04-03 21:52:19 -04:00
parent ecc619e4b6
commit 25d04fc9ea
1 changed files with 78 additions and 0 deletions
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78
math-replay/algebra/linear-equations-2.haml
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@ -50,3 +50,81 @@
x & = & 7 \over 6 \\
\end{eqnarray}
$$
%h2 Solve for $x$ (again):
#solve-for-x-04.solution
:escaped
$$
\begin{eqnarray}
10x + 7 & = & 8 \\
10x + 7 - 7 & = & 8 - 7 \\
10x & = & 1 \\
10x \over 10 & = & 1 \over 10 \\
x & = & 1 \over 10 \\
\end{eqnarray}
$$
%h2 Solve for $x$ (again):
#solve-for-x-05.solution
:escaped
$$
\begin{eqnarray}
10x + 3 & = & 5 \\
10x + 3 - 3 & = & 5 - 3 \\
10x & = & 2 \\
10x \over 10 & = & 2 \over 10 \\
x & = & 1 \over 5 \\
\end{eqnarray}
$$
%h2 Solve for $x$ (again):
#solve-for-x-06.solution
:escaped
$$
\begin{eqnarray}
4x + 9 & = & 10 \\
4x + 9 - 9 & = & 10 - 9 \\
4x & = & 1 \\
4x \over 4 & = & 1 \over 4 \\
x & = & 1 \over 4 \\
\end{eqnarray}
$$
%h2 Solve for $x$ (again):
#solve-for-x-07.solution
:escaped
$$
\begin{eqnarray}
7x - 5 & = & 9 \\
7x - 5 + 5 & = & 9 + 5 \\
7x & = & 14 \\
7x \over 7 & = & 14 \over 7 \\
x & = & 2 \\
\end{eqnarray}
$$
%h2 Solve for $x$ (again):
#solve-for-x-08.solution
:escaped
$$
\begin{eqnarray}
3x + 9 & = & 9 \\
3x + 9 - 9 & = & 9 - 9 \\
3x & = & 0 \\
3x \over 3 & = & 0 \over 3 \\
x & = & 0 \\
\end{eqnarray}
$$
%h2 Solve for $x$ (again):
#solve-for-x-09.solution
:escaped
$$
\begin{eqnarray}
3x + 10 & = & 7 \\
3x + 10 - 10 & = & 7 - 10 \\
3x & = & -3 \\
3x \over 3 & = & -3 \over 3 \\
x & = & -1 \\
\end{eqnarray}
$$