Question

Resuelve las siguientes ecuaciones: a) 9 + x = 3 b) -5 = x + 9 c) 4x + 12 = 8 d) 3x + 10 = 16 e) -5x + 12 = -8 f) -8 + 2x = x + 9

Answer 1

a) 9 + x = 3

   x = 3 - 9

   x = -6

b) -5 = x + 9

 -5 -9 = x

  -14 = x

c) 4x + 12 = 8

  4x = 8 - 12

 4x = -4

  x = -1

d) 3x + 10 = 16

 3x = 16 - 10

3x = 6

 x =2

e) -5x + 12 = -8

 -5x = -8 -12

 -5x = -20

   20 = 5x

    4 = x

 f) -8 + 2x = x + 9

   2x - x = 9 + 8

    x = 17