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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: 86+2(69-x)=6 mũ 3 ; 1000-5(8-x)mũ3 =375

Home/ Toán Lớp 6: 86+2(69-x)=6 mũ 3 ; 1000-5(8-x)mũ3 =375

Toán Lớp 6: 86+2(69-x)=6 mũ 3 ; 1000-5(8-x)mũ3 =375

Tháng Bảy 25, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: 86+2(69-x)=6 mũ 3 ; 1000-5(8-x)mũ3 =375

Comments ( 2 )

  1. lanminhngoc
    lanminhngoc
    25 Tháng Bảy, 2022 at 4:26 chiều
    Reply
    86 + 2( 69 – x ) = 6^3
    => 86 + 2( 69 – x ) = 216
    => 2( 69 – x ) = 216 – 86
    => 2( 69 – x ) = 130
    => 69 – x = 130 : 2
    => 69 – x = 65
    => x = 69 – 65
    => x = 4
      $\text{ Vậy x = 4 }$
    $\text{ ______________________ }$
    1000 – 5( 8 – x )^3 = 375
    => 5( 8 – x )^3 = 1000 – 375
    => 5( 8 – x )^3 = 625
    => ( 8 – x )^3 = 625 : 5
    => ( 8 – x )^3 = 125
    => ( 8 – x )^3 = 5^3
    => 8 – x = 5
    => x = 8 – 5
    => x = 3
      $\text{ Vậy x = 3 }$

  2. maianhnhiquynh
    maianhnhiquynh
    25 Tháng Bảy, 2022 at 4:25 chiều
    Reply
    86 + 2 ( 69 – x )= 6^3
    2 . ( 69 – x ) = 216 – 86
    69 – x = 130 : 2
    x = 69 – 65
    x = 4
    Vậy x = 4
    1000 – 5 ( 8 – x )^3 = 375
    5 . ( 8 – x )^3 = 1000 – 375
    ( 8 – x )^3 = 625 : 5
    ( 8 – x )^3 = 125
    ( 8 – x )^3 = 5^3
    ⇒ 8 – x = 5
    ⇒ x = 8 – 5
    ⇒ x = 3
    Vậy x = 3

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222-9+11+12:2*14+14 = ? ( )

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