解几道较简单的二元一次方程组(1)x/3-y/15=4/3 (2)0.5x+0.8y=4.7 x/4-y/10=4/3 1.2y+0.6x=6.6(3)3x-2y=(x-3y)/5=(2x-1)/4 快呀,(1)x/3-y/15=4/3 x/4-y/10=4/3 (2)0.5x+0.8y=4.7 1.2y+0.6x=6.6 (3)3x-2y=(x-3y)/5=(2x-1)/4怕你们看
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![解几道较简单的二元一次方程组(1)x/3-y/15=4/3 (2)0.5x+0.8y=4.7 x/4-y/10=4/3 1.2y+0.6x=6.6(3)3x-2y=(x-3y)/5=(2x-1)/4 快呀,(1)x/3-y/15=4/3 x/4-y/10=4/3 (2)0.5x+0.8y=4.7 1.2y+0.6x=6.6 (3)3x-2y=(x-3y)/5=(2x-1)/4怕你们看](/uploads/image/z/2603439-63-9.jpg?t=%E8%A7%A3%E5%87%A0%E9%81%93%E8%BE%83%E7%AE%80%E5%8D%95%E7%9A%84%E4%BA%8C%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%881%EF%BC%89x%2F3-y%2F15%3D4%2F3+%282%290.5x%2B0.8y%3D4.7+x%2F4-y%2F10%3D4%2F3+1.2y%2B0.6x%3D6.6%283%EF%BC%893x-2y%3D%28x-3y%29%2F5%3D%EF%BC%882x-1%29%2F4+%E5%BF%AB%E5%91%80%2C%EF%BC%881%EF%BC%89x%2F3-y%2F15%3D4%2F3+x%2F4-y%2F10%3D4%2F3+%282%290.5x%2B0.8y%3D4.7+1.2y%2B0.6x%3D6.6+%283%EF%BC%893x-2y%3D%28x-3y%29%2F5%3D%EF%BC%882x-1%29%2F4%E6%80%95%E4%BD%A0%E4%BB%AC%E7%9C%8B)
解几道较简单的二元一次方程组(1)x/3-y/15=4/3 (2)0.5x+0.8y=4.7 x/4-y/10=4/3 1.2y+0.6x=6.6(3)3x-2y=(x-3y)/5=(2x-1)/4 快呀,(1)x/3-y/15=4/3 x/4-y/10=4/3 (2)0.5x+0.8y=4.7 1.2y+0.6x=6.6 (3)3x-2y=(x-3y)/5=(2x-1)/4怕你们看
解几道较简单的二元一次方程组
(1)x/3-y/15=4/3 (2)0.5x+0.8y=4.7
x/4-y/10=4/3 1.2y+0.6x=6.6
(3)3x-2y=(x-3y)/5=(2x-1)/4 快呀,
(1)x/3-y/15=4/3
x/4-y/10=4/3
(2)0.5x+0.8y=4.7
1.2y+0.6x=6.6
(3)3x-2y=(x-3y)/5=(2x-1)/4
怕你们看不清题目,再重新输一遍
解几道较简单的二元一次方程组(1)x/3-y/15=4/3 (2)0.5x+0.8y=4.7 x/4-y/10=4/3 1.2y+0.6x=6.6(3)3x-2y=(x-3y)/5=(2x-1)/4 快呀,(1)x/3-y/15=4/3 x/4-y/10=4/3 (2)0.5x+0.8y=4.7 1.2y+0.6x=6.6 (3)3x-2y=(x-3y)/5=(2x-1)/4怕你们看
(1)5x-y=20 ----------a
5x-2y=80/3--------b
a-b:y=-20/3
x=8/3
(2) 1.5x+2.4y=14.1 -----------a
1.2x+2.4y=13.2 -----------b
a-b:0.3x=0.9
x=3
y=4
(3)3x-2y=(x-3y)/5
2x=y
所以,3x-2y=(2x-1)/4
3x-4x=(2x-1)/4
-4x =2x-1
x =1/6
y=1/3