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X=Y=102X-3Y+2Z=5X+2Y-Z=3
题目详情
X=Y=10
2X-3Y+2Z=5
X+2Y-Z=3
2X-3Y+2Z=5
X+2Y-Z=3
▼优质解答
答案和解析
X+Y=10 (1)
2X-3Y+2Z=5 (2)
X+2Y-Z=3 (3)
(2)+(3)×2
4X+Y=11 (4)
(4)-(1)
3X=1
所以
X=1/3
Y=10-X=29/3
Z=X+2Y-3=50/3
2X-3Y+2Z=5 (2)
X+2Y-Z=3 (3)
(2)+(3)×2
4X+Y=11 (4)
(4)-(1)
3X=1
所以
X=1/3
Y=10-X=29/3
Z=X+2Y-3=50/3
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