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

Toán Lớp 5: 205-7(x+5)=100 hãy giúp tôi càn gấp

Toán Lớp 5: 205-7(x+5)=100
hãy giúp tôi càn gấp

Comments ( 2 )

  1. 205 – 7(x + 5) = 100
    7(x + 5) = 205 – 100
    7(x + 5) = 105
    x + 5 = 105 : 7
    x + 5= 15
    x = 15 – 5
    x = 10

  2. 205-7(x+5)=100
    ⇒ 7(x+5) = 205-100
    ⇒ 7(x+5) = 105
    ⇒x+5 = 15
    ⇒x=15-5
    ⇒x=10

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