Giúp e vs ạ E votte 5 ????

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Giúp e vs ạ
E votte 5 ????
giup-e-vs-a-e-votte-5

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Diễm Kiều 5 years 2021-05-19T20:44:03+00:00 1 Answers 29 views 0

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  1. Acacia
    0
    2021-05-19T20:45:03+00:00
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    Đáp án:

     dưới ạ

    Giải thích các bước giải:

     `a)` `x+7/12=3/4`

    `=>x=3/4-7/12`

    `=>x=1/6`

    ———-

    `b)` `x-2/3=7/12`

    `=>x=7/12+2/3`

    `=>x=5/4`

    ———-

    `c)` `3/4*x-5=3(1)/3`

    `=>3/4*x-5=10/3`

    `=>3/4*x=10/3+5`

    `=>3/4*x=25/3`

    `=>x=25/3÷3/4`

    `=>x=100/9`

    ————

    `d)` `|x-2/5|=7/8`

    `TH1:` `x-2/5=7/8`

    `=>x=7/8+2/5`

    `=>x=51/40`

    `TH2:` `x-2/5=(-7)/8`

    `=>x=(-7)/8+2/5`

    `->x=(-19)/40`

    ———–

    `e)` `2/3+1/3÷x=3/5`

    `=>1/3÷x=3/5-2/3`

    `=>1/3÷x=(-1)/15`

    `=>x=(-1)/15×1/3`

    `=>x=(-1)/45`

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )