3x-2y=11,2x+3y=16
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![3x-2y=11,2x+3y=16](/uploads/image/z/979117-61-7.jpg?t=3x-2y%3D11%2C2x%2B3y%3D16)
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3x-2y=11,2x+3y=16
3x-2y=11,2x+3y=16
3x-2y=11,2x+3y=16
3x-2y=11, 1
2x+3y=16 2
1式*3 得 9x-6y=33 3
2式*2 得 4x+6y=32 4
3式+4式 得 13x=65
x=5
y=(5*3-11)/2=2
x=5 y=2
3x-2y=11 (1)
2x+3y=16 (2)
(1)×3+(2)×2
9x+4x=33+32
13x=65
x=5
代入(1)
15-2y=11
y=2
x=5
x=5
y=2
x=5 y=2
3x-2y=11 (1)式
2x+3y=16 (2)式
(1)x3
得9x-6y=33 (3)式
(2)x2得
4x+6y=32 (4)式
(3)+(4)得
13x=65
x=5
将x=5代入(1)式得
3x5-2y=11
解得y=2
所以x=5,y=2
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