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

Toán Lớp 6: Tim x 96-3(x-5)=57 [(6x-72):2-84].28=5628

Toán Lớp 6: Tim x
96-3(x-5)=57
[(6x-72):2-84].28=5628

Comments ( 1 )

  1. Lời giải chi tiết:
    a) 96-3(x-5)=57
    =>3(x-5)=96-57
    =>3(x-5)=39
    =>x-5=39:3
    =>x-5=13
    =>x=13+5
    =>x=18
    Vậy x=18
    b) [(6x-72):2-84].28=5628
    =>(6x-72):2-84=5628:28
    =>(6x-72):2-84=201
    =>(6x-72):2=201+84
    =>(6x-72):2=285
    =>6x-72=285.2
    =>6x-72=570
    =>6x=570+72
    =>6x=642
    =>x=642:6
    =>x=107
    Vậy x=107

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

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