Bepaal de waarde x. Bij wiskundetaal en vraagstukken, gebruik x om op te lossen.
\(2(-6x-3)=7-(-3+x)\)
\(\begin{align} & \color{red}{2} (-6x-3)& = & 7 \color{red}{-} (-3+x) \\\Leftrightarrow & -12x-6& = &7+3-x \\\Leftrightarrow & -12x \color{red}{-6} & = &10 \color{red}{-x} \\\Leftrightarrow & -12x \color{red}{-6} \color{blue}{+6} \color{blue}{+x} & = &10 \color{red}{-x} \color{blue}{+x} \color{blue}{+6} \\\Leftrightarrow & -12x+x& = &10+6 \\\Leftrightarrow & -11x& = &16 \\\Leftrightarrow & \frac{-11x}{ \color{red}{-11} }& = &\frac{16}{ \color{red}{-11} } \\\Leftrightarrow & x = \frac{-16}{11} & & \\ & V = \left\{ \frac{-16}{11} \right\} & \\\end{align}\)