Vgln. eerste graad (reeks 1)

Bepaal de waarde van x.

\(-2x+14=-14\)

\(\begin{align} & -2x \color{red}{+14}& = &-14 \\\Leftrightarrow & -2x \color{red}{+14}\color{blue}{-14} & = &-14\color{blue}{-14} \\\Leftrightarrow &-2x & = &-28\\\Leftrightarrow & \color{red}{-2}x & = &-28\\\Leftrightarrow & \frac{\color{red}{-2}x}{ \color{blue}-2} & = & \frac{-28}{-2} \\\Leftrightarrow & \color{green}{ x = 14 } & & \\ & V = \left\{ 14 \right\} & \\\end{align}\)