Matematika

Pertanyaan

2x+3y=8
x+4z=-6
2y-z=9

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  • 2x+3y=8
    x+4z= -6
    '''''''''''''''''''' -
    3y-8z=20 ....(1)
    y-z=9
    '''''''''''''''''''''-
    -5z= -7 -----》 z=7/5
    x+4(7/5)= -6 -----》x= -6-28/5 = -58/5
    y=9+7/5=52/5

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