Vgln. eerste graad (reeks 1)

Bepaal de waarde van x.

\(-4x-11=-8\)

\(\begin{align} & -4x \color{red}{-11}& = &-8 \\\Leftrightarrow & -4x \color{red}{-11}\color{blue}{+11} & = &-8\color{blue}{+11} \\\Leftrightarrow &-4x & = &3\\\Leftrightarrow & \color{red}{-4}x & = &3\\\Leftrightarrow & \frac{\color{red}{-4}x}{ \color{blue}-4} & = & \frac{3}{-4} \\\Leftrightarrow & \color{green}{ x = \frac{-3}{4} } & & \\ & V = \left\{ \frac{-3}{4} \right\} & \\\end{align}\)