Vgln. eerste graad (reeks 3)

Reeks met haakjes

\(2(-5x+4)=-1+(5+x)\)

\(\begin{align} & \color{red}{2} (-5x+4)& = & -1 \color{red}{+} (5+x) \\\Leftrightarrow & -10x+8& = &-1+5+x \\\Leftrightarrow & -10x \color{red}{+8} & = &4 \color{red}{+x} \\\Leftrightarrow & -10x \color{red}{+8} \color{blue}{-8} \color{blue}{-x} & = &4 \color{red}{+x} \color{blue}{-x} \color{blue}{-8} \\\Leftrightarrow & -10x-x& = &4-8 \\\Leftrightarrow & -11x& = &-4 \\\Leftrightarrow & \frac{-11x}{ \color{red}{-11} }& = &\frac{-4}{ \color{red}{-11} } \\\Leftrightarrow & x = \frac{4}{11} & & \\ & V = \left\{ \frac{4}{11} \right\} & \\\end{align}\)