Question

Dertemine o valor de x nas proporção

me ajudem​

Answer 1

Explicação passo-a-passo:

a)

$\sf \dfrac{x}{4}=\dfrac{5}{2}$

$\sf 2x=4\cdot5$

$\sf 2x=20$

$\sf x=\dfrac{20}{2}$

$\sf \red{x=10}$

b)

$\sf \dfrac{6}{x}=\dfrac{12}{10}$

$\sf 12x=6\cdot10$

$\sf 12x=60$

$\sf x=\dfrac{60}{12}$

$\sf \red{x=5}$

c)

$\sf \dfrac{1}{4}=\dfrac{x}{12}$

$\sf 4x=1\cdot12$

$\sf 4x=12$

$\sf x=\dfrac{12}{4}$

$\sf \red{x=3}$

d)

$\sf \dfrac{45}{16}=\dfrac{x}{48}$

$\sf 16x=45\cdot48$

$\sf 16x=2160$

$\sf x=\dfrac{2160}{16}$

$\sf \red{x=135}$

Answer 2

Explicação passo-a-passo:

a) $\frac{x}{4} = \frac{5}{2}$

2x=20

x=10

b)$\frac{6}{x} = \frac{12}{10}$

12x=60

x=5

c)$\frac{1}{4} =\frac{x}{12}$

4x=12

x=3

d)$\frac{45}{16} =\frac{x}{48}$

16x=2.160

x=135