Question

me ajudem, por favor​

Answer 1

$\dfrac{a}{2} = \dfrac{5}{c} \\ \\ ac = 2 \times 5 \\ \\ \blue{ac = 10}$

$\dfrac{4}{b} = \dfrac{d}{5} \\ \\ bd = 4 \times 5 \\ \\ \blue{ bd = 20}$

$\dfrac{11ac - 2bd}{7ac + 5bd} \\ \\ = \dfrac{11(10) - 2(20)}{7(10) + 5(20)} \\ \\ = \dfrac{110 - 40}{70 + 100} \\ \\ = \green{ \dfrac{7}{17} }$

Bons Estudos!