帮我做一下,6,7,8,9,
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帮我做一下,6,7,8,9,
![](http://img.wesiedu.com/upload/0/1e/01e7a7ea85761b4a02da5547cf60ba76.jpg)
![](http://img.wesiedu.com/upload/0/1e/01e7a7ea85761b4a02da5547cf60ba76.jpg)
![帮我做一下,6,7,8,9,](/uploads/image/z/3940476-60-6.jpg?t=%E5%B8%AE%E6%88%91%E5%81%9A%E4%B8%80%E4%B8%8B%2C6%2C7%2C8%2C9%2C)
6.B 7. y=3/4 8.x=18
再问: 谢谢你
再问:![](http://img.wesiedu.com/upload/9/ad/9ad91d6fd82c5f95df7c6457d84f7ad4.jpg)
再问:![](http://img.wesiedu.com/upload/8/e7/8e783933e0cadb32368bd62f164362e8.jpg)
再答: 14.ax/2+10/2-(7x-3)/2=0, (ax+10-7x+3)/2=0, (a-7)x+13=0. (a-7)x=-13,因为x为正整数,所以a-7可能为-1或者-13,解得a=6或a=-6,又因为a亦为正整数,所以a=6
再答: 1/2{1/2[1/2(x/2-3)-3]-3}=3, 1/2[1/2(x/2-3)-3]-3=6, 1/2[1/2(x/2-3)-3]=9, 1/2(x/2-3)-3=18, 1/2(x/2-3)=21, x/2-3=42, x/2=45, x=90
再问: 谢谢你
再问:
![](http://img.wesiedu.com/upload/9/ad/9ad91d6fd82c5f95df7c6457d84f7ad4.jpg)
再问:
![](http://img.wesiedu.com/upload/8/e7/8e783933e0cadb32368bd62f164362e8.jpg)
再答: 14.ax/2+10/2-(7x-3)/2=0, (ax+10-7x+3)/2=0, (a-7)x+13=0. (a-7)x=-13,因为x为正整数,所以a-7可能为-1或者-13,解得a=6或a=-6,又因为a亦为正整数,所以a=6
再答: 1/2{1/2[1/2(x/2-3)-3]-3}=3, 1/2[1/2(x/2-3)-3]-3=6, 1/2[1/2(x/2-3)-3]=9, 1/2(x/2-3)-3=18, 1/2(x/2-3)=21, x/2-3=42, x/2=45, x=90