Question

Resolva as equações
A) 2= 12+ x
B)3 (2y-1)= -75
C)2 (4x-5)-14=4 (x + 2) +8
D)-(4y-2)+y=-8 (2-3y)+4
E)z-11/6=z/6+2z/9
F)x-3/4 - 3-4x/3=3x-1/2 - x+4/7

Answer 1

a) x= 12 -2 
     x= 10
b) 3(2y - 1) = -75 
      2y = -75 - 3 + 1
       2y = -77
       y = 2/77 
       y = 38.5 
  c)2 (4x-5)-14=4 (x + 2) +8
     4x - x  = 4+2 +5 +8 + 14 
      3x =   33
      x = 33/3 
      x = 11
d) (4y-2)+y=-8 (2-3y)+4 
    4y + y + 3y = -8 + 2 +4 +2 
         8y    = 0 
          y = 0/8 
            y = 0
 

Answer 2

a)2=12+x=
-x=12-2
-x=10
x=-10


b)3(2y -1)=-75
6y -3=-75
6y=-75 +3
6y=-72
y=-72/6
y=-12

c)2(4x -5) -14=4(x +2) +8
8x -10 -14=4x + 8 + 8
8x -4x=10 + 14 +8 +8
4x=24 + 16
4x=40
x=40/10
x=4

d)-(4y -2) + y= - 8(2 -3y) +4
-4y +2 +y =-16 +24y +4
-4y -24y +y=-2 -16 +4
-28y + y =-18 + 4
-27y=-22
y= -22/-27

e)z -11/6= z/6 +2z/9
18z/18 - 33/18= 3z/18 + 4z/18
18z/18 -3z/18 +4z/18=+33/18
15z/18 + 4z/18=33/18
19z/18=33/18
19z = 33/18 × 18
19z=33
z=33/19

f)x- 3/4 -3 -4x/3=3x -1/2 -x +4/7
x +x -4x/3 -3x=3/4 +3 +1/2 +4/7
-1x -4x/3= /56 + 168 /56
-3x/3 -4x/3=