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

Toán Lớp 6: a)105 – (135 – 7 x) : 9 = 97 b)275 – ( 113 + x ) + 63 = 158

Tháng Bảy 4, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a)105 – (135 – 7 x) : 9 = 97
b)275 – ( 113 + x ) + 63 = 158

Comments ( 2 )

  1. catlantuong
    catlantuong
    4 Tháng Bảy, 2022 at 4:26 sáng
    Reply
    $\text{ @HV }$
    $\text{ a) 105 – (135 – 7x) : 9 = 97 }$
    $\text{ ⇒ (135 – 7x) : 9 = 105 – 97 }$
    $\text{ ⇒ (135 – 7x) : 9 = 8 }$
    $\text{ ⇒ 135 – 7x = 8 . 9 }$
    $\text{ ⇒ 135 – 7x = 72 }$
    $\text{ ⇒ 7x = 135 – 72 }$
    $\text{ ⇒ 7x = 63 }$
    $\text{ ⇒ x = 63 : 7 }$
    $\text{ ⇒ x = 9 }$
    $\text{ b) 275 – (113 + x) + 63 = 158 }$
    $\text{ ⇒ 338 – (113 + x) = 158 }$
    $\text{ ⇒ 338 – 113 – x = 158 }$
    $\text{ ⇒ 225 – x = 158 }$
    $\text{ ⇒ x = 225 – 158 }$
    $\text{ ⇒ x = 67 }$
     

  2. hienchaudiem
    hienchaudiem
    4 Tháng Bảy, 2022 at 4:25 sáng
    Reply
    105 – (135 – 7x) : 9 = 97
    => (135 – 7x) : 9 = 8
    => 135 – 7x = 72
    => 7x = 63
    => x = 9
    Vậy x = 9 thì 105 – (135 – 7x) : 9 = 97
    275 – ( 113 + x ) + 63 = 158
    => 275 – ( 113 + x ) = 95
    => 113 + x = 180
    => x = 67
    Vậy x = 67 thì 275 – ( 113 + x ) + 63 = 158

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

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