Question

I need a bit of help. I need to solve for x.

Answer 1

ΔABC and ΔADE are similar, then

$\frac{AB}{AD}=\frac{BC}{DE}$

Replacing with data and solving for x,

$\begin{gathered} \frac{4}{7}=\frac{2}{x} \\ 4\cdot x=7\cdot2 \\ x=\frac{14}{4} \\ x=3.5 \end{gathered}$