解方程2/3x+1/2y=-5/24 1/4x-1/6y=-1/6写的认不清,就问我~!速度!过程!过程!第一个等式和第二个等式用大括号连{2/3x+1/2y=-5/24① {1/4x-1/6y=-1/6②
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![解方程2/3x+1/2y=-5/24 1/4x-1/6y=-1/6写的认不清,就问我~!速度!过程!过程!第一个等式和第二个等式用大括号连{2/3x+1/2y=-5/24① {1/4x-1/6y=-1/6②](/uploads/image/z/179483-59-3.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B2%2F3x%2B1%2F2y%3D-5%2F24+1%2F4x-1%2F6y%3D-1%2F6%E5%86%99%E7%9A%84%E8%AE%A4%E4%B8%8D%E6%B8%85%2C%E5%B0%B1%E9%97%AE%E6%88%91%7E%21%E9%80%9F%E5%BA%A6%21%E8%BF%87%E7%A8%8B%21%E8%BF%87%E7%A8%8B%21%E7%AC%AC%E4%B8%80%E4%B8%AA%E7%AD%89%E5%BC%8F%E5%92%8C%E7%AC%AC%E4%BA%8C%E4%B8%AA%E7%AD%89%E5%BC%8F%E7%94%A8%E5%A4%A7%E6%8B%AC%E5%8F%B7%E8%BF%9E%7B2%2F3x%2B1%2F2y%3D-5%2F24%E2%91%A0++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%7B1%2F4x-1%2F6y%3D-1%2F6%E2%91%A1)
解方程2/3x+1/2y=-5/24 1/4x-1/6y=-1/6写的认不清,就问我~!速度!过程!过程!第一个等式和第二个等式用大括号连{2/3x+1/2y=-5/24① {1/4x-1/6y=-1/6②
解方程2/3x+1/2y=-5/24 1/4x-1/6y=-1/6
写的认不清,就问我~!速度!过程!过程!
第一个等式和第二个等式用大括号连{2/3x+1/2y=-5/24①
{1/4x-1/6y=-1/6②
解方程2/3x+1/2y=-5/24 1/4x-1/6y=-1/6写的认不清,就问我~!速度!过程!过程!第一个等式和第二个等式用大括号连{2/3x+1/2y=-5/24① {1/4x-1/6y=-1/6②
第一个方程两边乘以24,得 16x+12y=-5------(3)
第二个方程两边乘以12,得 3x-2y=-2------(4)
(2)*6,18x-12y=-12------(5)
(3)+(5),34x=-17,x=-1/2;
x=-1/2代入(3),-8+12y=-5,y=1/4.
2/3x+1/2y=-5/24
1/4x-1/6y=-1/6
16x+12y=-5
3x-2y=-2
16x+12y=-5
18x-12y=-12
34x=-17
x=-1/2
y=(3x+2)/2
y=[3*(-1/2)+2]/2
y=1/4
第一个为1式,第二个为2式,1式乘以1/3得2/9x+1/6y=-5/72为3式,3式加2式,得17/36x=-17/72所以x=-1/2 y=1/4
2/3x+1/2y=-5/24为方程1,1/4x-1/6y=-1/6为方程2,
方程2x3,变为3/4x-1/2y=-1/2为方程3
方程1加上方程3,整理得
17/12x=-17/24,解得x=-1/2,带入方程1,解得
y=1/4