Question

O triângulo ABC é equilátero. Determine x e y.

Answer 1

$\large\boxed{\begin{array}{l}\sf\overline{\sf AB}=\overline{\sf AC}\\\sf 2x-5=7\\\sf 2x=7+5\\\sf2x=12\\\sf x=\dfrac{12}{2}\\\sf x=6\\\sf\overline{\sf BC}=\overline{\sf AC}\\\sf y+4=7\\\sf y=7-4\\\sf y=3\end{array}}$