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

Toán Lớp 5: Giải chi tiết giúp mik ạ: tìm x ạ x*( 1975/8*9+ 1885/9*10+ 1755/10*11+1579/11*12 + 6)= 1/24

Toán Lớp 5: Giải chi tiết giúp mik ạ: tìm x ạ
x*( 1975/8*9+ 1885/9*10+ 1755/10*11+1579/11*12 + 6)= 1/24

Comments ( 2 )

  1. x(1975/8 . 9 + 1885/9 . 10 + 1755/10 . 11 + 1579/11 . 12+6)=1/24
    =>x(17775/8+18850/9+351/2 . 11 + 189/48 +6)=1/24
    =>x(17775/8+18850/9+3661/2+18948/11+6)=1/24
    =>x(1759725/792+1658800/792+1449756/792+1364256/792+6)=1/24
    =>x((1759725+1658800+1449756+1364256)/792+6)=1/24
    =>6316489/792.x=1/24
    =>x=1/24:6316489/792
    =>x=33/6316489

  2. x × ( x$\frac{1975}{8×9}$  +$\frac{1885}{9×10}$ +$\frac{1755}{10×11}$  + $\frac{1579}{11×12}$+6)=$\frac{1}{24}$ 
    x×($\frac{1975}{72}$+ $\frac{377}{9×2}$ +$\frac{351}{2×11}$+ $\frac{1579}{132}$ +6)=$\frac{1}{24}$ 
    x×($\frac{1975}{72}$+ $\frac{377}{18}$ +$\frac{351}{22}$ +$\frac{1579}{132}$ + 6)=$\frac{1}{24}$ 
    x×$\frac{1975}{24}$= $\frac{1}{24}$ 
    x=$\frac{1}{24}$ : $\frac{1975}{24}$ 
    x=$\frac{1}{1975}$ 
     

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

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