Question

Resolva (fração) matemática 9° ano:

Answer 1

Utilizei o asterisco no lugar do sinal de vezes.

a) 6x = 3 * 10
x = 30/6
x = 5

b) 52x = 4 * 91
x = 364/52
x = 7

c) 21x = 7 * 18
x = 126/21
x = 6

d) 30x = 2 * 105
x = 210/30
x = 7

e) 32x = 8 * 36
x = 288/32
x = 9

f) 48x = 3 * 128
x = 384/48
x = 8. ; )

Answer 2

Oi.

Neste caso multiplique cruzado.

a) x/3 = 10/6

6.x = 3.10

6x = 30

x = 30/6

x = 5

b) x/4 = 91/52

52.x = 4.91

52x = 364

x = 364/52

x = 7

c) x/7 = 18/21

21.x = 7.18

21x = 126

x = 126/21

x = 6

d)  x/105 = 2/30

30.x = 105.2

30x = 210

x = 210/30

x = 7

e) x/8 = 36/32

32.x = 8.36

32x = 288

x = 288/32

x = 9

f) x/3 = 128/48

48.x = 3.128

48x = 384

x = 384/48

x = 8

Espero ter ajudado.

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