x+3y =6﹛4x+2y=10-----------------------------------4分之x+3分之y=6分之1﹛2(x-1)=3(y+2)
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x+3y =6
﹛
4x+2y=10
-----------------------------------
4分之x+3分之y=6分之1
﹛
2(x-1)=3(y+2)
x+3y=6 ==>4x+12y=24……1
4x+2y=10……2
1-2得
10y=14
y=7/5
x=9/5
(2)
x/4+y/3=1/6 ==>3x+4y=2 ==>6x+8y=4 ……1
2x-2=3y+2 ==>2x-3y=4 ==>6x-9y=12 ……2
1-2得
17y=-8
y=-8/17
x=22/17
你确定这不是方程组,,
x+3y =6 ①
4x+2y=10 ②
①*4-②得
12y-2y=24-10
10y=14
y=7/5
代入①得
x=6-3*7/5=9/5
所以方程组的解为
x=9/5
y=7/5
x/4+y/3=1/6 ①
2(x-1)=3(y+2) ②
①*24得
6...
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x+3y =6 ①
4x+2y=10 ②
①*4-②得
12y-2y=24-10
10y=14
y=7/5
代入①得
x=6-3*7/5=9/5
所以方程组的解为
x=9/5
y=7/5
x/4+y/3=1/6 ①
2(x-1)=3(y+2) ②
①*24得
6x+8y=4 ③
化简②得
2x-2=3y+6
2x-3y=8 ④
④*3-③得
-9y-8y=24-4
-17y=20
y=-20/17
代人④得
2x=8-3*20/17=76/17
x=38/17
所以方程组的解为
x=38/17
y=-20/17
收起
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