Vgln. eerste graad (reeks 1)

Bepaal de waarde van x.

\(15x+2=5\)

\(\begin{align} & 15x \color{red}{+2}& = &5 \\\Leftrightarrow & 15x \color{red}{+2}\color{blue}{-2} & = &5\color{blue}{-2} \\\Leftrightarrow &15x & = &3\\\Leftrightarrow & \color{red}{15}x & = &3\\\Leftrightarrow & \frac{\color{red}{15}x}{ \color{blue}15} & = & \frac{3}{15} \\\Leftrightarrow & \color{green}{ x = \frac{1}{5} } & & \\ & V = \left\{ \frac{1}{5} \right\} & \\\end{align}\)