Matematika

Pertanyaan

1. 4x - 2y = -2, 2x + y = 11
2. 5x - y = 8, 2x + 3y = 27
3. 2y - x = 10, 3x + 2y = 22
4. 3x - 2y = 7, 2x + y = 14

1 Jawaban

  • [tex]no 4 \\ jawab \\ 3(2) - 2y = 7 \\ 6 - 2y = 7 \\ 2y = 7 - 6 \\ 2y = 1 \\ y = 2 \div 1 \\ y = 2 [/tex]

    3x-2(-1) =7
    3x +2 =7
    3x =7-2
    3x =5
    x= 5:3
    x=1,6

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