Matematika

Pertanyaan

Tentukan nilai x dari persamaan harga mutlak

a. | 3-2x | = 4
b. | 3x+2 | = |5|
c. | x+5 | = | 1-x |

1 Jawaban

  • a. 3 - 2x = 4
    2x = 4 - 3
    2x = 1
    x = 1/2

    b. 3x + 2 = 5
    3x = 5 - 2
    3x = 3
    x = 3/3
    x = 1

    c. x + 5 = 1 - x
    x + x = 1 - 5
    2x = -4
    x = -4/2
    x = -2

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