( 17 x – 25 ) : 8 + 65 = 9 mũ 2

Question

( 17 x – 25 ) : 8 + 65 = 9 mũ 2

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Ladonna 4 years 2020-11-20T06:12:12+00:00 2 Answers 143 views 0

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    0
    2020-11-20T06:13:38+00:00

    $↓$

    $(17x-25):8+65=9²$

    $⇔ (17x-25):8+65=81$

    $⇔ 17x-25+250=648$

    $⇔ 17x+495=648$

    $⇔ 17x=153$

    $⇔ x=9$

    0
    2020-11-20T06:13:50+00:00

    ( 17 x – 25 ) : 8 + 65 = $9^{2}$

    ( 17 x – 25 ) : 8 = 81 – 65

    ( 17 x – 25 ) : 8 =16

    ( 17 x – 25 ) = 16.8

    ( 17 x – 25 )=128

      17 x          =128 + 25

      17 x          =153

          x           = 153 : 17

          x           =9

     

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