Question

Calcule o valor de x nas proporções:


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Answer 1

a) 35x = 750

x= 750/ 35

x= 21,42

b) 18x = 90

x=90/ 18

x= 5

c) 12x= 24

x=24/12

x= 2

d) 21x= 168

x= 168/ 21

x=8

Espero ter ajudado

Answer 2

Oie, Td Bom?!

a)

35/25 = 30/x

[35 ÷ 5]/[25 ÷ 5] = 30/x

7/5 = 30/x

[7x]/5 = 30

7x = 30 . 5

7x = 150

x = 150/7

x = 21,47

b)

2x/15 = 6/9

2x/15 = [6 ÷ 3]/[9 ÷ 3]

2x/15 = 2/3

[3 . 2x]/15 = 2

3 . 2x = 2 . 15

6x = 30

x = 30/6

x = 5

c)

2x/3 = 8/6

2x/3 = [8 ÷ 2]/[6 ÷ 2]

2x/3 = 4/3

2x = 4

x = 4/2

x = 2

d)

6/7 = 3x/28

[6 . 28]/7 = 3x

6 . 28 = 7 . 3x

168 = 21x

21x = 168

x = 168/21

x = 8

Att. Makaveli1996