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

Toán Lớp 6: a,7x + 2x = 918 b,137 – 7.(1 +4x) = 102

Home/ Toán Lớp 6: a,7x + 2x = 918 b,137 – 7.(1 +4x) = 102

Toán Lớp 6: a,7x + 2x = 918 b,137 – 7.(1 +4x) = 102

Tháng Tám 19, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a,7x + 2x = 918
b,137 – 7.(1 +4x) = 102

Comments ( 2 )

  1. lanthuhoa
    lanthuhoa
    19 Tháng Tám, 2022 at 11:32 chiều
    Reply
    Answer
    a, 7x + 2x = 918
    => 9x = 918
    => x = 918 : 9
    => x = 102
    $\text{Vậy}$ x = 102
    _______________________
    b, 137 – 7 . (1 + 4x) = 102
    => 7 . (1 + 4x) = 137 – 102
    => 7 . (1 + 4x) = 35
    => 1 + 4x = 35 : 7
    => 1 + 4x = 5
    => 4x = 5 – 1
    => 4x = 4
    => x = 4 : 4
    => x = 1
    $\text{Vậy}$ x = 1

  2. maianhnhiquynh
    maianhnhiquynh
    19 Tháng Tám, 2022 at 11:32 chiều
    Reply
    7x + 2x = 918
    9x=918
    x=918:9
    x=102
    137 – 7.(1 +4x) = 102
    7.(4x+1) = 137-102
    7.(4x+1) = 35
    (4x+1) = 35:7
    4x+1=5
    4x=5-1
    4x=4
    x=4:4
    x=1
     

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

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