[ 3-4420 - op net sinds 30.3.2020-(E)-24.10.2023 ]
Translation in E N G L I S H
What is the solution of the equation
x = x + 32
|
A. 16 |
B. 2.( + ) |
C. 16.( + ) |
D. 4 |
E. 4.( + ) |
Oplossing - Solution
$$
\begin{aligned}
& \sqrt{5}\, x=\sqrt{3}\, x+32
\\
\Leftrightarrow & \; \sqrt{5}\, x -\sqrt{3}\, x=32
\\
\Leftrightarrow & \; ( \sqrt{5}\, x -\sqrt{3} ) \, x=32
\\
\Leftrightarrow & \; x=\frac{32}{\sqrt{5}\, -\sqrt{3}}
\\
\Leftrightarrow & \; x = \frac{32\cdot (\sqrt{5}\, +\sqrt{3})} {(\sqrt{5}\, -\sqrt{3}).(\sqrt{5}\, +\sqrt{3})}
\\
\Leftrightarrow & \; x=\frac{32\cdot (\sqrt{5}\, +\sqrt{3})} {5-3}
\\
\Leftrightarrow & \; x = 16 \cdot (\sqrt{5}\, +\sqrt{3})
\end{aligned}
$$