Question

Considerando a figura, em que a//b//c, qual o valor de x+y?

Answer 1

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$\sf{\dfrac{x}{4}=\dfrac{5}{8}}\\\sf{x=\dfrac{\diagup\!\!\!4^1\cdot5}{\diagup\!\!\!8^2}}\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=\dfrac{5}{2}=\dfrac{10}{4}~\checkmark}}}}$

$\sf{\dfrac{y}{2,75}=\dfrac{8}{5}}\\\sf{y=\dfrac{2,75\cdot8}{5}}\\\sf{y=\dfrac{22\div2}{8\div2}}\\\huge\boxed{\boxed{\boxed{\boxed{\sf y=\dfrac{11}{4}~\checkmark}}}}$

$\sf x+y=\dfrac{10}{4}+\dfrac{11}{4}\\\huge\boxed{\boxed{\boxed{\boxed{\sf x+y=\dfrac{21}{4}\checkmark}}}}$