a) (1-1/7) . (1-1/8) . (1-1/9) … (1-1/2011) Tìm x a) (x-4/7) : 2/5 = -5/7 b) 3/5x – 1/2x = -7/20

Question

a) (1-1/7) . (1-1/8) . (1-1/9) … (1-1/2011)
Tìm x
a) (x-4/7) : 2/5 = -5/7
b) 3/5x – 1/2x = -7/20

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Skylar 3 tuần 2021-11-22T23:44:47+00:00 2 Answers 4 views 0

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    0
    2021-11-22T23:45:56+00:00

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    0
    2021-11-22T23:46:02+00:00

     (x-4/7) : 2/5 = -5/7

    ->x-4/7=-5/7.2/5

    ->x-4/7=-2/7

    ->x=2/7

    3/5x – 1/2x = -7/20

    1/10x=-7/20

    X=-7/2

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