Vgln. eerste graad (reeks 2)

Bepaal de waarde van x. Meerdere manieren van oplossen mogelijk

\(7x-11=8-3x\)

\(\begin{align} & 7x \color{red}{-11}& = & 8 \color{red}{ -3x } \\\Leftrightarrow & 7x \color{red}{-11}\color{blue}{+11+3x } & = & 8 \color{red}{ -3x }\color{blue}{+11+3x } \\\Leftrightarrow & 7x \color{blue}{+3x } & = & 8 \color{blue}{+11} \\\Leftrightarrow &10x & = &19\\\Leftrightarrow & \color{red}{10}x & = &19\\\Leftrightarrow & \frac{\color{red}{10}x}{ \color{blue}{ 10}} & = & \frac{19}{10} \\\Leftrightarrow & \color{green}{ x = \frac{19}{10} } & & \\ & V = \left\{ \frac{19}{10} \right\} & \\\end{align}\)