Vgln. eerste graad (reeks 2)

Bepaal de waarde van x. Meerdere manieren van oplossen mogelijk

\(-11x-2=-7+10x\)

\(\begin{align} & -11x \color{red}{-2}& = & -7 \color{red}{ +10x } \\\Leftrightarrow & -11x \color{red}{-2}\color{blue}{+2-10x } & = & -7 \color{red}{ +10x }\color{blue}{+2-10x } \\\Leftrightarrow & -11x \color{blue}{-10x } & = & -7 \color{blue}{+2} \\\Leftrightarrow &-21x & = &-5\\\Leftrightarrow & \color{red}{-21}x & = &-5\\\Leftrightarrow & \frac{\color{red}{-21}x}{ \color{blue}{ -21}} & = & \frac{-5}{-21} \\\Leftrightarrow & \color{green}{ x = \frac{5}{21} } & & \\ & V = \left\{ \frac{5}{21} \right\} & \\\end{align}\)