Question

24 RESOLVA AS EQUAÇÕES .

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

e)-x - 2x - 4 = 11
             -3x = 11 + 4
             -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 

Answer 2

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

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

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

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

e) -x -2x -4= 11
-3x= 11 + 4
-3x = 15 (-1)
3x= -15
x= -15/3 = -5

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