Nilai 2x - 3y + z dari persamaan 2x +y =3 , 2x -2 =3 , y +2z =1
Matematika
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Pertanyaan
Nilai 2x - 3y + z dari persamaan 2x +y =3 , 2x -2 =3 , y +2z =1
1 Jawaban
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1. Jawaban faatika
2x - 3y + z
2x - 2 = 3
2x = 3 + 2
2x = 5
x =5/2
2x + y = 3
2(5/2) + y = 3
5 + y = 3
y = 3 - 5
y = -2
y + 2z = 1
(-2) + 2z = 1
2z = 1+2
2z = 3
z = 3/2
2x - 3y + z
=2(5/2) - 3(-2) + (3/2)
=5 + 6 + 3/2
=25/2
semoga membantu :)))