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

Toán Lớp 6: 7/4.x.(33/12+3333/2020+333333/303030+33333333/42424242)=22

Toán Lớp 6: 7/4.x.(33/12+3333/2020+333333/303030+33333333/42424242)=22

Comments ( 2 )

  1. 7/4 . x (33/12+3333/2020+333333/303030+33333333/42424242)=22
    =>7/4 . x(33/12+(3333:101)/(2020:101)+(333333:10101)/(3030300:10101)+(33333333:1010101)/(42424242:1010101))=22
    =>7/4 . x(33/12+33/20+33/30+33/42)=22
    =>7/4 . x(11/4+33/20+11/10+11/14)=22
    =>7/4 . x(55/20+33/20+22/20+11/14)=22
    =>7/4 . x(110/20+11/14)=22
    =>7/4 . x(11/2+11/14)=22
    =>7/4 . x(77/14+11/14)=22
    =>7/4 . x . 44/7=22
    =>11x=22
    =>x=22/11=2

  2. 7/4 . x . (33/12 + 3333/2020 + 333333/303030 + 33333333/42424242) = 22
    7/4 . x . (11/4 + 33/20 + 11/10 + 11/14) = 22
    7/4 . x . 11 . (1/4 + 3/20 + 1/10 + 1/14) = 22
    77/4 . x . (35/140 + 21/140 + 14/140 + 10/140) = 22
    77/4 . x . 80/140 = 22
    77/4 . x . 4/7 = 22
    77/4 . 4/7 . x = 22
    (77 . 4)/(4 . 7) . x = 22
    (11 . 7 . 4)/(4 . 7) . x = 22
    11 . x = 22
    x = 22 : 11
    x = 2
     

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