Vgln. eerste graad (reeks 3)

Reeks met haakjes

\(6(-4x-1)=2+(12+x)\)

\(\begin{align} & \color{red}{6} (-4x-1)& = & 2 \color{red}{+} (12+x) \\\Leftrightarrow & -24x-6& = &2+12+x \\\Leftrightarrow & -24x \color{red}{-6} & = &14 \color{red}{+x} \\\Leftrightarrow & -24x \color{red}{-6} \color{blue}{+6} \color{blue}{-x} & = &14 \color{red}{+x} \color{blue}{-x} \color{blue}{+6} \\\Leftrightarrow & -24x-x& = &14+6 \\\Leftrightarrow & -25x& = &20 \\\Leftrightarrow & \frac{-25x}{ \color{red}{-25} }& = &\frac{20}{ \color{red}{-25} } \\\Leftrightarrow & x = \frac{-4}{5} & & \\ & V = \left\{ \frac{-4}{5} \right\} & \\\end{align}\)