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

Toán Lớp 5: 7,5 × x + 1,5 × x + x = 48 Giúp please

Toán Lớp 5: 7,5 × x + 1,5 × x + x = 48
Giúp please

Comments ( 2 )

  1. 7,5 × x + 1,5 × x + x = 48
    ( 7,5 + 1,5 + 1) × x = 48
    10 × x = 48
             x = 48 ÷ 10
             x = 4,8

  2. 7,5 × x + 1,5 × x + x = 48
    (7,5x+1.5x)+x=48
    9x+x=48
    10x=48
    x=4.8
     

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