Question

Calcule o valor se X nas grandezas diretamente proporcionais

Answer 1

Explicação passo-a-passo:

a)

$\sf \dfrac{x}{6}=\dfrac{8}{4}$

$\sf 4x=6\cdot8$

$\sf 4x=48$

$\sf x=\dfrac{48}{4}$

$\sf \red{x=12}$

b)

$\sf \dfrac{x}{15}=\dfrac{4}{5}$

$\sf 5x=15\cdot4$

$\sf 5x=60$

$\sf x=\dfrac{60}{5}$

$\sf \red{x=12}$

c)

$\sf \dfrac{3}{2}=\dfrac{x}{10}$

$\sf 2x=3\cdot10$

$\sf 2x=30$

$\sf x=\dfrac{30}{2}$

$\sf \red{x=15}$

d)

$\sf \dfrac{4}{5}=\dfrac{x}{10}$

$\sf 5x=4\cdot10$

$\sf 5x=40$

$\sf x=\dfrac{40}{5}$

$\sf \red{x=8}$