X+y+2z=14 2x+2y+2z=20 x+2y+z=12
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Pertanyaan
X+y+2z=14 2x+2y+2z=20 x+2y+z=12
1 Jawaban
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1. Jawaban gresya14
x+y+2z=14 x2
2x+2y+2z=20 x1
menjadi ....
2x+2y+4z=28
2x+2y+2z=20
-------------------------- --
2z = 8
z= 4
x+y+2x4=14 menjadi x+y=14-8=6
x+2y+4 = 12 menjadi x+2y = 12-4 = 8
x+y=6
x+2y=8
------------ --
-y = -2
y = 2
x + y + 2z = 14
x + 2 + 8 = 14
x = 14 - 10
x = 4