Bisa tolong nggk isiin plizz lh a DieliminasiKn bukan disubstitusikan 5x+2y+3z=18 (i) 2x-3y+z=3 (ii) 3x+4y-2z=6 (iii) Perhatikan di eliminasikanlah bukan disubs

(i) 5x + 2y + 3z = 18z >> ×1 >> 5x + 2y - 3z = 18
(ii) 2x - 3y + z = 3 >> ×3 >> 6x - 9y + 3z = 9
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(iv) 11x - 7y = 27
(ii) 2x - 3y + z = 3 >> ×2 >> 4x - 6y + 2z = 6
(iii) 3x + 4y - 2z = 6 >> ×1 >> 3× + 4y - 2z = 6
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(v) 7x - 2y = 12

(iv) 11x - 7y = 27 >> ×2 >> 22x - 14y = 54
(v) 7x - 2y = 12 >> ×7 >> 49x - 14y = 84
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-27x = -30
x = 9/10

7x - 2y = 12
(7 × 9/10) - 2y = 12
63/10 - 2y = 12
-2y = 120/10 - 63/10
-2y = 57/10
y = -57/20

2x - 3y + z = 3
(2 × 9/10) - (3 × (-57/20)) + z = 3
9/5 + 171/20 + z = 3
36/20 + 171/20 + z = 3
207/20 + z = 3
z = 3 - 207/20
z = 60/20 - 207/2
z = 147/20