3.3 Lösning 1a

$\quad\begin{array}{rclcl} \boxed{2\,x} \, - \, 6 \; & = & 10 & \qquad & {\rm Täck\;över\;} 2\,x \\ \boxed{\;\,?\;\,} \, - \, 6 \; & = & 10 & & \\ \quad \boxed{\,16\,} \, - \, 6 \; & = & 10 & & \end{array}$

$\qquad\qquad\;\; \Downarrow$

$\;\; \begin{array}{rclcl} 2 \;\, \cdot \;\, x \; & = & 16 & \qquad & {\rm Täck\;över\;} x \\ 2 \;\, \cdot \; \boxed{x} & = & 16 & & \\ 2 \;\, \cdot \; \boxed{?} & = & 16 & & \\ 2 \;\, \cdot \; \boxed{8} & = & 16 & & \\ \end{array}$

$\qquad\;\;\;\, \Downarrow$

$\quad\;\;\, x \; = \; 8$