5x+y=2,x-3y=4,求x和y,

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5x+y=2,x-3y=4,求x和y,

5x+y=2,x-3y=4,求x和y,
5x+y=2,x-3y=4,求x和y,

5x+y=2,x-3y=4,求x和y,
5x+y=2.①
x-3y=4.②
①x3+②得
15x+3y+x-3y=6+4
16x=10
x=5/8
则y=2-5x=2-25/8= -9/8