$\"\"$

\

The first equation is (AB)C

\

$\"\"$

\

$\"\"$

\

$\"\"$ $\"\"$

\

Substitute matrix C

\

$\"\"$

\

$\"\"$

\

$\"\"$ $\"\"$

\

The second equation is $\"\"$

\

$\"\"$

\

Substitute matrix A

\

$\"\"$

\

$\"\"$

\

Multiply columns by rows.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The solution of equation (AB)C=(CB)A is False.

\