Matematika

Pertanyaan

carilah penyelesaian soal dari

1. x + 5 = 12
2. 2x + 8 = 18
3. 4x + 5 = 2x + 3
4. 2(3x+3)= 3x + 18
5.1/4x + 2/3 = 1/2

1 Jawaban

  • 1. x + 5 = 12
    x = 12 - 5
    x = 7

    2. 2x + 8 = 18
    2x = 18-8
    2x = 10
    x = 10/5
    x = 2

    3. 4x + 5 = 2x + 3
    4x - 2x = 3 - 5
    2x = -2
    x = -2/2
    x = -1

    4. 2(3x+3)= 3x + 18
    6x + 6 = 3x + 18
    6x - 3x = 18 - 6
    3x = 12
    x = 12/3
    x = 4

    5. 1/4x + 2/3 = 1/2
    1/4x = 1/2 - 2/3, samakan penyebutnya
    1/4x = 3/6 - 4/6
    1/4x = -1/6 , kalikan silang
    -4 = 6x
    x = -6/4

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