a)1/2-|3/4-5/6|=1-x b) x-(-1/5) -|5/3-1/2|=3/4 c)x+|1/5-4/3|=|-7/4| d)|1-1/2|+x=|-5/4|

0 bình luận về “a)1/2-|3/4-5/6|=1-x b) x-(-1/5) -|5/3-1/2|=3/4 c)x+|1/5-4/3|=|-7/4| d)|1-1/2|+x=|-5/4|”

1. Đáp án:

   $a)1/2-|3/4-5/6|=1-x$

   $⇔ 1/2 – |-1/12| = 1-x$

   $⇔ 1/2 – 1/12 – 1 + x = 0$

   $⇔ -7/12 + x =0 $

   $⇔ x = 7/12$

   $b) x-(-1/5) -|5/3-1/2|=3/4$

   $⇔ x – (-1/5) – 7/6 – 3/4 =0 $

   $⇔ x – (-103/60)=0$

   $⇔ x= 103/60$

   $c)x+|1/5-4/3|=|-7/4|$

   $⇔ x + |-17/15| = 7/4$

   $⇔ x + 17/15 – 7/4 =0 $

   $⇔ x – 37/60 =0 $

   $⇔ x = 37/60$

   $d)|1-1/2|+x=|-5/4|$

   $⇔ |1/2| + x = 5/4$

   $⇔ 1/2 + x – 5/4 =0 $

   $⇔ x – 3/4 =0 $

   $⇔ x=3/4$

   BẠN THAM KHẢO NHA!!!

    

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