Question

complete as frações para que sejam equivalentes: 2/3=x/30 b) 20/25=16/x

Answer 1

Explicação passo-a-passo:

a)

$\sf \dfrac{2}{3}=\dfrac{x}{30}$

$\sf 3x=2\cdot30$

$\sf 3x=60$

$\sf x=\dfrac{60}{3}$

$\sf x=20$

$\sf \dfrac{2}{3}=\dfrac{20}{30}$

b)

$\sf \dfrac{20}{25}=\dfrac{16}{x}$

$\sf 20x=25\cdot16$

$\sf 20x=400$

$\sf x=\dfrac{400}{20}$

$\sf x=20$

$\sf \dfrac{20}{25}=\dfrac{16}{20}$

Answer 2

Oie, Td Bom?!?

a)

2/3 = x/30

2 . 30 = 3x

60 = 3x

3x = 60

x = 60/3

x = 20

2/3 = 20/30

b)

20/25 = 16/x

[20 ÷ 5]/[25 ÷ 5] = 16/x

4/5 = 16/x

4x = 16 . 5

4x = 80

x = 80/4

x = 20

20/25 = 16/20

Att. Makaveli1996