x-2020/12+x-2020/20+x-2020/30+x-2020/42+x-2020/72= 16/9

0 bình luận về “x-2020/12+x-2020/20+x-2020/30+x-2020/42+x-2020/72= 16/9”

1. *Lời giải :

   `x – 2020/12 + x – 2020/20 + x – 2020/30 + x  – 2020/42 + x – 2020/72 = 16/9`

   `-> (x + x + x + x + x) + (-2020/12 – 2020/20 – 2020/30 – 2020/42 – 2020/72) = 16/9`

   `-> 5x + = 16/9 – 2020/12 + 2020/20 + 2020/30 + 2020/42 + 2020/72`

   `-> x = (16/9 – 2020/12 + 2020/20 + 2020/30 + 2020/42 + 2020/72)/5`

    

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