3.3 Lösning 5
Från Mathonline
\(\begin{array}{rclcl} x \, + \, 7 & = & -10 & \qquad | & - \, 7 \\ x \, + \, 7 \, - \, 7 & = & -10 \, - \, 7 & & \\ x & = & -17 \end{array}\)
\(\begin{array}{rclcl} x \, + \, 7 & = & -10 & \qquad | & - \, 7 \\ x \, + \, 7 \, - \, 7 & = & -10 \, - \, 7 & & \\ x & = & -17 \end{array}\)