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

Toán Lớp 6: 1440 : [ 120 : ( 3x + 9 ) ] = 120 giúp em vs ạ

Toán Lớp 6: 1440 : [ 120 : ( 3x + 9 ) ] = 120
giúp em vs ạ

Comments ( 2 )

  1. 1440 : [ 120 : ( 3x + 9 ) ] = 120
    120 : ( 3x + 9 ) = 1440 : 120
    120 : ( 3x + 9 ) = 12
    3x + 9 = 120 : 12
    3x + 9 =  10
    3x = 10 – 9
    3x = 1
    x = 1: 3
    x = 1/{3} 
    Vậy x = 1/{3} 

  2. 1440:[120:(3x+9)]=120
    120:(3x+9)=1440:120
    120:(3x+9)=12
    3x+9=120:12
    3x+9=10
    3x=10-9
    3x=1
    x=1/3
    Vậy x=1/3
     

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

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