3.3 Lösning 1b

\[\begin{array}{rclcl} 2 \, x \, + \, 14 & = & 18 & \qquad & {\rm Täck\;över\;} 2\,x \\ \boxed{2\,x} \, + \, 14 & = & 18 & & \\ \;\, 4 \;\;\; + \; 14 & = & 18 & \qquad & - \, 1 \\ \end{array}\]

\( 2 \, x \;\; + \; 14 \; = \; 18 \quad {\color{Red} {\rm Täck\;över\;}} 2 \, x \)

\(\quad\)

\( \, + \;\, 14 \; = \; 18 \)

\( \;\, 4 \;\;\; + \; 14 \; = \; 18 \)

\( \;\, \Downarrow \)

\( \, {\color{Red} {2 \, \cdot \; x}} \;\; = \;\, 4 \qquad\quad {\color{Red} {{\rm Täck\;över\;} x}}\)

\( \, 2 \, \cdot \; \)

\( \quad \)

\( \; = \;\, 4 \)

\( \, 2 \, \cdot \; 2 \;\; = \;\; 4 \)

\( \quad\;\;\; \Downarrow \)

\( \; {\color{Red} x} \; = \; 2 \)