Question

Calcule o valor de x, de modo a obter proporções.Quais são as respostas? a)1/3=x/15 b)x/4=6/8 c)5/2=15/x d)6/154=30/x e)3/x=1,25/x f)7,5/1,5=x/6

Answer 1

A) 1/3 = X/15

   3X = 15 . 1

    X = 15 /3

    X= 5

B) X/4 = 6/8

  8X = 6 . 4

  8X = 24

    X = 24 /8

    X = 3

C) 5/2 = 15/X

   5X = 2 . 15

   5X = 30

   X = 30/5

  X = 6

D) 6/154 = 30/X

   6X = 154 . 30

  6X = 4620

  X = 4620 / 6

 X = 770

E) 3/X = 1,25/X

   ?????

 

  F) 7,5/1,5 = X/6

  1,5X = 7,5 . 6

  1,5X = 45

   X = 45/ 1,5

  X = 30