0.1y=2x,5x+y=5

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0.1y=2x,5x+y=50.1y=2x,5x+y=50.1y=2x,5x+y=50.1y=2xy=20x代入5x+y=55x+20x=525x=5所以x=0.2y=20x=4y=20x5x+20x

0.1y=2x,5x+y=5
0.1y=2x,5x+y=5

0.1y=2x,5x+y=5
0.1y=2x
y=20x
代入5x+y=5
5x+20x=5
25x=5
所以
x=0.2
y=20x=4

y=20x
5x+20x=5
25x=5
x=0.2
y=4

0.1y=2x
y=20x
代入5x+y=5
5x+20x=5
25x=5
所以
x=0.2
y=20x=4

0.1y=2x， 0.5x+0.1y=0.5
x=0.2
y=4
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