Matematika

Pertanyaan

4x-3y=1
2x-y=-3

Maka nilai 3x+2y
A. -2
B. -1
C. 1
D. 2
E. 3

Plis bsok dkumpulin

2 Jawaban

  • 4x - 3y = 1 > ×1 > 4x - 3y = 1
    2x - y = -3 > ×2 > 4x - 2y = -6
    eliminasi
    -y = 7
    y = -7

    y = -7 , persamaan 1
    4x - 3y = 1
    4x -3.-7 = 1
    4x + 21 = 1
    4x = 1 - 21
    4x = -20
    x = -5

    nilai 3x +2y
    = 3.-5 + 2.-7
    = -15 + (-14)
    = -15 -14
    = -29


  • B. -1
    x=-5
    y=7
    3x+2y
    3(-5)+2(7)=-1

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