Gruppe A - lernen mit Serlo!

\displaystyle \frac{1}{2}x-2

=

\displaystyle \dfrac{1}{2}-x+2x

\displaystyle \ \cdot2

\displaystyle x-4

=

\displaystyle 1-2x+4x

\displaystyle \ +2x-4x

\displaystyle x+2x-4x-4

=

\displaystyle 1

\displaystyle \ +4

\displaystyle x+2x-4x

=

\displaystyle 5

\displaystyle -x

=

\displaystyle 5

\displaystyle \ \cdot(-1)

\displaystyle x

=

\displaystyle -5

$\displaystyle \frac{1}{2}x-2$	$=$	$\displaystyle \dfrac{1}{2}-x+2x$	$\displaystyle \ \cdot2$
$\displaystyle x-4$	$=$	$\displaystyle 1-2x+4x$	$\displaystyle \ +2x-4x$
$\displaystyle x+2x-4x-4$	$=$	$\displaystyle 1$	$\displaystyle \ +4$
$\displaystyle x+2x-4x$	$=$	$\displaystyle 5$
	↓	Fasse zusammen
$\displaystyle -x$	$=$	$\displaystyle 5$	$\displaystyle \ \cdot(-1)$
$\displaystyle x$	$=$	$\displaystyle -5$