Question

Resolva as Equações U=Q
a) 2x + 6 = x + 18
b) 5x – 3 = 2x + 9
c) 3x – 5 = x – 2
d) 3x – 5 = 13 e) 3x + 5 = 2
f) x – (2x – 1) = 23

Answer 1

Resposta:

A) x = 12

B) x=4

C) x=3/2

D) x=6

E) x=-1

F) x=-22

Explicação passo-a-passo:

a) 2x+6 = x+18

   6-18 = x-2x

   -12 = -x

     12 = x

b) 5x-3 = 2x+9

   5x-2x = 9 +3

   3x = 12

   x = 12/3

   x = 4

c) 3x-5 = x-2

   3x -x = 5-2

   2x = 3

   x = 3/2

d) 3x-5 = 13

   3x = 13+5

   3x = 18

   x = 18/3

   x = 6

e) 3x+5 =2

   3x = 2-5

   3x = -3

   x = -3/3

   x = -1

f) x-(2x-1) = 23

  x -2x +1 = 23

  -x = 23 -1

  -x = 22

  x = 22/-1

  x = -22