Matematika

Pertanyaan

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

6. 4x - 2 = 6x - 7
3. 7
7. 4x - 2 + 2x + 1 = 3
3. 5

2 Jawaban

  • 1/3 (x + 3) = 1/2(x - 2) --> kdua ruas kali 62(x+3) = 3(x-2)
    2x+6 = 3x-6
    2x-3x = -6-6
    -x = -12
    x = 12


    (4x+1)+2x + 2 = 11
    4x+1+2x+2 = 11
    6x+3 = 11
    6x = 11-3
    6x = 8
    x = 8/6 = 4/3

    4x - 2 = 6x - 7
    4x-6x = -7+2
    -2x = -5
    x = 5/2


    4x - 2 + 2x + 1 = 3
    6x-1 = 3
    6x = 3+1
    6x = 4
    x = 4/6 = 2/3
  • 4.  1/3 (x + 3) = 1/2 (x - 2)
            1/3x + 1  =  1/2x -1
         1/3x - 1/2x = -1 - 1
         2/6x - 3/6x = -2
                   -1/6x = -2
                         x  = -2 kali -6
                         x  = 12

    6. 4x - 2 = 6x - 7
         4x - 6x = -7 + 2
              -2x = -5
               x = -5/-2
               x = 2,5

    7. 4x - 2 + 2x + 1 = 3
                    4x + 2x = 3 + 2 - 1
                           6x  = 3
                             x  = 4/6
                           x = 2/3

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