Question

alguém pode me ajudar??​

Answer 1

10) a) 16/28 | mdc * 4

16 : 4/28 : 4 = 4/7

b) 25/100 | mdc *25

25 : 25/100 : 25 = 1/4

11) a) 3/4 = x/8

3 × 8/4 = x

24/4 = x

x = 6

b) 7/10 = 21/x

7x = 21 × 10

7x = 210

x = 210/7

x = 30

c) 12/18 = x/9 ->> 2/3 = x/9

2 × 9/3 = x

18/3 = x

x = 6

d) x/81 = 3/9

x = 1/3 × 81

x = 81/3

x = 27