Vgln. eerste graad (reeks 2)

Bepaal de waarde van x. Meerdere manieren van oplossen mogelijk

\(-7x-14=-10+8x\)

\(\begin{align} & -7x \color{red}{-14}& = & -10 \color{red}{ +8x } \\\Leftrightarrow & -7x \color{red}{-14}\color{blue}{+14-8x } & = & -10 \color{red}{ +8x }\color{blue}{+14-8x } \\\Leftrightarrow & -7x \color{blue}{-8x } & = & -10 \color{blue}{+14} \\\Leftrightarrow &-15x & = &4\\\Leftrightarrow & \color{red}{-15}x & = &4\\\Leftrightarrow & \frac{\color{red}{-15}x}{ \color{blue}{ -15}} & = & \frac{4}{-15} \\\Leftrightarrow & \color{green}{ x = \frac{-4}{15} } & & \\ & V = \left\{ \frac{-4}{15} \right\} & \\\end{align}\)