(1)8x+7y+5z=160
x+y+z=20
一式-二式×5得:3x+2y=60
y=30-3/2x
z=20-x-y=20-x-(30-3/2x)=1/2x-10
因此,30-3/2x>0,1/2x-10>0
200
25
求下列方程組的正整數(shù)解:(1)8x+7y+5z=160 x+y+z=20 (2)3x+5y+6z=200 x+y+z=50
求下列方程組的正整數(shù)解:(1)8x+7y+5z=160 x+y+z=20 (2)3x+5y+6z=200 x+y+z=50
求下列方程組的正整數(shù)解:
(1)8x+7y+5z=160
x+y+z=20
(2)3x+5y+6z=200
x+y+z=50
求下列方程組的正整數(shù)解:
(1)8x+7y+5z=160
x+y+z=20
(2)3x+5y+6z=200
x+y+z=50
數(shù)學(xué)人氣:170 ℃時間:2020-09-19 08:10:38
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