x y=30,x z=28,y z=38,x y z=48,求x,y,z
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发布时间:2023-10-11 19:18
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时间:2024-10-21 23:46
x+ y=30 (1)
x+ z=28 (2)
y+ z=38 (3)
x+ y+ z=48 (4)
(1)+(2)+(3)
2(x+y+z)=96
x+y+z=48 = (4)
(1)-(2)
y-z= 12 (5)
(5)+(3)
2y=50
y=25
from (3)
25+z=38
z=13
from (3)
x+y+z=48
x+25+13=48
x=10