Matematika

Pertanyaan

(X - 3) + (7-2x)=6
Jawab:

2 Jawaban

  • (x - 3) + (7-2x)=6
    x - 3 + 7 - 2x  = 6
    x - 2x +7        = 6
    -1x                 = 6 - 7
    -x                   = -1
    x                    = 1
  • 7x-2x²-21+6x = 6
    2x²-7x-6x+21-6 = 0
    2x²-13x+15 = 0
    (2x-3) (x-5) = 0
    2x=3 atau x=5
    x=3/2

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