[tex]\boxed{\begin{array}{l}\sf 4^2=2,4^2+c^2\\\sf c^2+5,76=16\\\sf c^2=16-5,76\\\sf c^2=10,24\\\sf c=\sqrt{10,24}\\\sf c=3,2\\\sf 4^2=y\cdot c\\\sf 3,2y=16\\\sf y=\dfrac{16}{3,2}\\\sf y=5\\\sf 2,4\cdot y=4\cdot x\\\sf 4x=2,4\cdot5\\\sf 4x=12\\\sf x=\dfrac{12}{3}\\\sf x=4\end{array}}[/tex]
