Question

Determine o valor de x na proporção abaixo: A x=7 B x=10 C x 49 D x=70
7 49
=
x 70

Answer 1

$\large\boxed{\begin{array}{l} \sf \dfrac{7}{x} = \dfrac{49}{70} \\ \\ \sf \: 49x = 70 \times 7 \\ \\ \sf \: 49x = 490 \\ \\ \sf \: x = \dfrac{490}{49} \\ \\ \boxed{ \boxed{ \boxed{ \sf{x = 10}}}} \leftarrow \textsf{Letra B}\end{array}}$