x + y + z = 40 ( 1 ) 75x + 120y + 150z = 4.020.000 ( 2 ) x = 2y ( 3 )
Matematika
ikwal4
Pertanyaan
x + y + z = 40 ( 1 ) 75x + 120y + 150z = 4.020.000 ( 2 ) x = 2y ( 3 )
1 Jawaban
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1. Jawaban AldrichEzekiel
3y+z=40 --> 3y=40-z
270y+150z=402.10^4 (5)
30(9y+5z)=402.10^4
9y+5z=134.10^3
3(40-z)+5z=134.000
120-3z+5z=134.000
2z=133.880
Z= 66.940
3y=40-66.940
Y= -22.300
X=2(-22.300)
X= -44.600
Y= -22.300
Z= 66.940