Question

me ajudem pfvvv, 15 pontos !!

Answer 1

a) 12

b) 2

c) 2

d) 5

e) 3

f) 15

Answer 2

Explicação passo-a-passo:

A)

$\dfrac{3}{5} = \dfrac{x}{20}$

$5x = 3 \times 20$

$5x = 60$

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

$x = 12$

_________

3/5=12/10

B)

$\dfrac{18}{45} = \dfrac{x}{5}$

$45x = 18 \times 5$

$45x = 90$

$x = \dfrac{90}{45}$

$x = 2$

___________

18/45=2/5

C)

$\dfrac{4}{8} = \dfrac{1}{x}$

$4x = 8 \times 1$

$4x = 8$

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

$x = 2$

__________

4/8=1/2

D)

$\dfrac{x}{4} = \dfrac{10}{8}$

$8x = 4 \times 10$

$8x = 40$

$x = \dfrac{40}{8}$

$x = 5$

__________

5/4=10/8

E)

$\dfrac{5}{5} = \dfrac{3}{x}$

$5x = 5 \times 3$

$5x = 15$

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

$x = 3$

__________

5/5=3/3

F)

$\dfrac{6}{10} = \dfrac{9}{x}$

$6x = 10 \times 9$

$6x = 90$

$x = \dfrac{90}{6}$

$x = 15$

___________

6/10=9/15