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Sagot :
3x + 2y + 2z = 3 ⇒ 3x + 2y + 2z = 3
1x + 2y - 1z = 5 ⇒ 1x + 2y - 1z = 5
2x - 4y + 1z = 0 4x + 4y + 1z = 8
4x + 4y + 1z = 8 ⇒ 12x + 12y + 3z = 24
3x + 2y + 2z = 3 3x - 2y = 5 ⇒ 12x - 8y = 20
1x + 2y - 1z = 5 ⇒ 1x + 2y - 1z = 5 20y + 3z = 4
2x - 4y + 1z = 0 ⇒ 2x - 4y + 1z = 0 20y - 20y + 3z = 4 - 20y
3x - 2y = 5 3z = 4 - 20y
3 3
z = 1¹/₃ - 6²/₃y
20y + 3(1¹/₃ - 6²/₃y) = 4
20y + 4 - 20y = 4
20y - 20y + 4 = 4
0y + 4 = 4
- 4 - 4
0y = 0
0 0
y = 0
20(0) + 3z = 4
0 + 3z = 4
3z = 4
3 3
z = 1¹/₃
4x + 4(0) + 1¹/₃ = 8
4x + 0 + 1¹/₃ = 8
4x + 1¹/₃ = 8
- 1¹/₃ - 1¹/₃
4x = 6²/₃ 4 4
x = 1²/₃
1x + 2y - 1z = 5 ⇒ 1x + 2y - 1z = 5
2x - 4y + 1z = 0 4x + 4y + 1z = 8
4x + 4y + 1z = 8 ⇒ 12x + 12y + 3z = 24
3x + 2y + 2z = 3 3x - 2y = 5 ⇒ 12x - 8y = 20
1x + 2y - 1z = 5 ⇒ 1x + 2y - 1z = 5 20y + 3z = 4
2x - 4y + 1z = 0 ⇒ 2x - 4y + 1z = 0 20y - 20y + 3z = 4 - 20y
3x - 2y = 5 3z = 4 - 20y
3 3
z = 1¹/₃ - 6²/₃y
20y + 3(1¹/₃ - 6²/₃y) = 4
20y + 4 - 20y = 4
20y - 20y + 4 = 4
0y + 4 = 4
- 4 - 4
0y = 0
0 0
y = 0
20(0) + 3z = 4
0 + 3z = 4
3z = 4
3 3
z = 1¹/₃
4x + 4(0) + 1¹/₃ = 8
4x + 0 + 1¹/₃ = 8
4x + 1¹/₃ = 8
- 1¹/₃ - 1¹/₃
4x = 6²/₃ 4 4
x = 1²/₃
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