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

Toán Lớp 6: tìm x a, 13-{8-x}= -5 b, 2 mũ 5 -{x-15}=10 c, 2. {x-5}-{x+7}=14

Toán Lớp 6: tìm x
a, 13-{8-x}= -5
b, 2 mũ 5 -{x-15}=10
c, 2. {x-5}-{x+7}=14

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    a, 13-{8-x}= -5
    8-x=13-(-5)
    8-x=18
    x=8-18
    x=-10
     Vậy x=-10
    b, 2 mũ 5 -{x-15}=10
    32-(x-15)=10
    x-15=32-10
    x-15=22
    x=22+15
    x=37
    Vậy x=37
    c, 2. {x-5}-{x+7}=14
    2x-10-x-7=14
    (2x-x)-(10+7)=14
    x-17=14
    x=14+17
    x=31
    Vậy x=31
     Chúc bn học tốt!!! Cho mik hay nhất nha!!!

  2. a) 13 – (8 – x) = – 5
    <=> 13 – 8 + x = – 5
    <=> 5 + x = – 5
    <=> x = – 5 – 5
    <=> x = – 10
    $\\$
    b) 2^5 – (x – 15) = 10
    <=> 32 – x + 15= 10
    <=> 47 – x = 10
    <=> x = 47 – 10
    <=> x = 37
    $\\$
    c) 2(x – 5) – (x + 7) = 14
    <=> 2x – 10 – x – 7 = 14
    <=> x – 17 = 14
    <=> x = 14 + 17
    <=> x = 31
    $# Ling$

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