Question

Teorema de pitagoras
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Answer 1

$\boxed{\begin{array}{l}\sf\bigg(\dfrac{3}{4}x\bigg)^2+x^2=10^2\\\sf\dfrac{9}{16}x^2+x^2=100\cdot16\\\sf 9x^2+16x^2=1600\\\sf25x^2=1600\\\sf x^2=\dfrac{1600}{25}\\\sf x^2=64\\\sf x=\sqrt{64}\\\sf x=8\end{array}}$