Question

Resolva as seguintes equações:
a) 3x = 12
b) 9x = 18
c) 35x = –105
d) 7x – 1 = 13
e) 6x – 10 = 2x + 14
f) 6x = 2x + 28

Answer 1

Respostas:

a) 3x = 12

   x = 12/3

   x = 4

b) 9x = 18

   x = 18/9

   x = 2

c) 35x = - 105

  x = - 105/35

  x = - 3

d) 7x - 1 = 13

   7x = 13 + 1

   7x = 14

   x = 14/7

   x = 2  

e) 6x - 10 = 2x + 14

   6x - 2x = 14 + 10

   4x = 24

   x = 24/4

   x = 6  

f) 6x = 2x + 28

  6x - 2x = 28

  4x = 28

  x = 28/4

  x = 7