3x-2y=112x+3y=16

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3x-2y=112x+3y=163x-2y=112x+3y=163x-2y=112x+3y=16因为3x-2y=11所以9x-6y＝33因为2x+3y=16所以4x+6y=32两式相加13x=65x=

3x-2y=112x+3y=16
3x-2y=11
2x+3y=16

3x-2y=112x+3y=16
因为 3x-2y=11
所以 9x-6y＝33
因为 2x+3y=16
所以 4x+6y=32
两式相加 13x=65
x=5
代入 3x-2y=11
y=2
用解集表示为 {(x,y)|(5,2)}

(1)3x-2y=11
(2)2x+3y=16
(1)3x=11+2y => x=(11+2y)/3 带入 (2)
(2) 2[(11+2y)/3]+3y=16 => (22+4y+9y)/3=16 =>
y = 2
x = 5

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