Question

2) Resolva as equações de 1o grau: a) 2x + 8 = -12 b) 5x + 13 – x = 6x + 12 c) x – 7 = 7 d) – 4x = –12x e) 6x = 2x + 16 f) – 3 = x + 10 g) – 4x – 10 = 2x + 2 h) x + x – 4 = 17 – 2x + 1

Answer 1

Resposta:

Explicação passo-a-passo:

a) 2x = -12-8

   2x = -20

   x = -20/2 = -10

b) 5x-x-6x = 12-13

   -2x = -1

   x = -1/-2 = 1/2

c) x = 7+7 = 14

d) -4x+12x = 8x

e) 6x-2x = 16

   4x = 16

   x = 16/4 = 4

f) -3-10 = x

  -13 = x

g) -4x-2x = 2+10

   -6x = 12

   x = 12/-6 = -2

h) x+x+2x = 17+1+4

   4x = 22

   x = 22/4 = 5,5