Question

Resolva as equações sendo X e Q;
a)4m - 1 =7

B)5m -2 + 12 . 6 m + 4

'
C) M + 4 - 3 M = 4 + 12 m


D) 2 m -4 + 12 = 3m - 4 + 2


E) 3 (x + 2 = 15

F) 2 (x - 1) = 0

G)-3 (m + 2) = 1

H) 2 (x + 2) = 12

I) x/2 +1/3 = 4/3

Answer 1

a) 4m - 1 = 7
    4m = 7 +1
    4m = 8
      m = 8/4
      m = 2


B) 5m -2 + 12 . 6 m + 4 =
    5m -2     +72m      +4 =
    5m +72m = +2 -4
    77m =  -2 
    m = -2/77
     

C) M + 4 - 3 M = 4 + 12 m
     m -3m -12m = 4 -4 +3
     -14m = 3
          m = 3/-14
          m = -3/14


D) 2 m -4 + 12 = 3m - 4 + 2
     2m -3m = -4 +2 +4 -12
     -m = -16 +9
      m = -7/-1
      m = +7


E) 3 (x + 2) = 15
     3x +6 = 15
     3x = 15 -6
     3x = 9
       x = 9/3
       x = 3


F) 2 (x - 1) = 0
    2x -2 = 0
    2x = 2
      x = 2/2
      x = 1


G) -3(m + 2) = 1
     -3m -6 = 1
     -3m = 1 -6
     -3m = -5
        m = -5/-3
        m = 5/3


H) 2(x + 2) = 12 
     2x +4 = 12
     2x = 12 -4
     2x = 8
       x = 8/2
       x = 4


I) x/2 +1/3 = 4/3            mmc 6
   3.x/6 +2.1/6 = 2.4/6   elimine agora os denominadores
   3x +2 = 8
   3x = 8 -2
   3x = 6
     x = 6/3
     x = 2