Question

Resolva

A)5x+3x=16

B)x+x+8=54

C)7x-2-5x=18

D)12x-10x-4=3

E)-x-2x-4=11

F)8x=5x+4,5

Answer 1

a) 5x + 3x = 16
8x = 16
x = 16/8
x = 2

b) x + x + 8 = 54
2x + 8 = 54
2x = 54 - 8 
2x = 46
x = 46/2
x = 23

c) 7x - 2 - 5x =18
7x - 5x = 18 + 2
2x = 20
x = 20/2
x = 10

d) 12x - 10x - 4 = 3                        
     2x - 10x = 3 + 4
      2x = 7
      x = 7/2

e) -x - 2x - 4 = 11
-3x = 4 + 11
-3x = 15
3x = -15
x = -15/3
x = -5

f) 8x = 5x + 4,5                     
   8x - 5x = 4,5                     
    3x = 4,5
     x = 4,5/3
     x = 1,5

Espero ter ajudado!