2x一x=2.1这个方程怎么解？求过程。

\u6c42\u89e3\u65b9\u7a0b2x-x+1/2=2+x+1/2

2x-(x+1)/2=2+(x+1)/2
4x-(x+1)=4+(x+1)
\u89e3\uff1a4x-x-1=4+x+1
3x-1=x+5
3x-1-x-5=0
2x-6=0
x=3
\u7ecf\u68c0\u9a8c\uff0cx=3\u662f\u65b9\u7a0b\u7684\u6839\u3002

\u8bdd\u8bf4\uff0c\u7a76\u7adf\u662f(x^2-2x+1)/(x+2)=0\u8fd8\u662fx^2-2x+(1/x)+2=0\uff1f
\u5982\u679c\u662f\u524d\u8005\uff0c\u90a3\u4e48
[(x-1)^2]/(x+2)=0\uff0c\u5f97x=1\uff0c\u552f\u4e00\u89e3\uff1b
\u5982\u679c\u662f\u540e\u8005\uff0c\u90a3\u4e48\u53ef\u6574\u7406\u7684
(x-1)^2=-(1+1/x)
\u5728\u540c\u4e00\u4e2a\u5e73\u9762\u76f4\u89d2\u5750\u6807\u7cfb\u91cc\u4f5cy=(x-1)^2\u548cy=-(1/x)-1\u7684\u56fe\u50cf\uff0c
\u53ef\u77e5\uff0c\u53ea\u6709\u552f\u4e00\u4ea4\u70b9\uff0cx\u2208(-0.25\uff0c-0.5)

2x减x等于2.1
2x减x等于x
so x等于2.1

1x=2.1

 

x=1x

 

2x涓x=2.1杩欎釜鏂圭▼鎬庝箞瑙?姹傝繃绋嬨
绛旓細2x鍑弜绛変簬x so x绛変簬2.1

瑙ｆ柟绋:2X=2.1X 姹俋=??
绛旓細鍥

浜寈脳x=2鐐瑰洓杩欎釜鏂圭▼鎬庝箞瑙
绛旓細2x²=2.4 x²=2.4梅2 x²=1.2 x=鈭1.2 x=鈭6/2

2x-x=3.5 杩欎釜鏂圭▼鎬庝箞瑙?
绛旓細鍥炵瓟锛1x绛変簬3.5x绛変簬3.5

2X+0.9=2.1X瑙ｆ柟绋?
绛旓細瑙ｏ細2X+0.9=2.1X 2.1X-2X=0.9 0.1X=0.9 X=0.9梅0.1 X=9 鎵浠ュ師鏂圭▼鐨勮В涓篨=9

1.5脳3-2x=2.1 杩欎釜鏂圭▼鎬庝箞瑙?涓姝ヤ竴姝ョ殑,涓嶈涓涓嬪氨绠楀嚭鏉ヤ簡鐨
绛旓細4.5-2x=2.1 2x=4.5-2.1 2x=2.4 x=2.4梅2 x=1.2

3.5x(1-2x)=2.1,瑙ｆ柟绋銆
绛旓細3.5x(1-2x)=2.1 瑙ｏ細3.5-7x=2.1 7x=3.5-2.1 7x=1.4 x=0.2

(1.5+x)/(1.05+x)=2杩欎釜鏂圭▼鎬庝箞瑙?
绛旓細瑙ｏ細锛坸+1.5锛/(x+1.05)=2 x+1.5=2x+2.1 2x-x=1.5-2.1 x=-0.6

鍒濅腑鏁板瑙ｆ柟绋绗旇
绛旓細瑙ｆ柟绋鏄暟瀛︿腑鐨勪竴绉嶅熀鏈繍绠,閫氳繃绛夊紡涓よ竟鐨勫彉褰,姹傚嚭鏈煡鏁扮殑鍊笺瑙ｆ柟绋嬫楠よВ鏂圭▼鐨勬楠ゅ寘鎷:鍘绘嫭鍙枫佸悎骞跺悓绫婚」銆佺Щ椤广佸寲绠銆佹眰瑙ｃ瑙ｆ柟绋嬪疄渚嬩緥濡:20=5+3脳5;30=5+5脳5;40=19+3脳7鎴40=7+3脳11;a+3a=4a;6x+6x=12x;6b-1.5b=4.5b;4m+4m-m=7m;8a-6a+2a=4a;7x+2x-x=8x銆...

2x涓10=x 10瑙鏂圭▼鎬庝箞瑙?
绛旓細2X-10=X+10锛2X-X=10+10锛孹=20銆

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