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

Toán Lớp 6: a,10+3.(x-1)mũ 3 = 5 mũ 5 : 5 mũ 3 + (-12) b,53+3.(x-15) = 29 mik cần gấp ạ

Toán Lớp 6: a,10+3.(x-1)mũ 3 = 5 mũ 5 : 5 mũ 3 + (-12)
b,53+3.(x-15) = 29
mik cần gấp ạ

Comments ( 2 )

  1. Lời giải chi tiết:
    a) 10+3.(x-1)^3=5^5:5^3+(-12)
    =>3.(x-1)^3=5^2-12-10
    =>3.(x-1)^3=25-22
    =>3.(x-1)^3=3
    =>(x-1)^3=3:3
    =>(x-1)^3=1
    =>x-1=1
    =>x=1+1
    =>x=2
    Vậy x=2
    b) 53+3.(x-15)=29
    =>3.(x-15)=29-53
    =>3.(x-15)=-24
    =>x-15=-24:3
    =>x-15=-8
    =>x=-8+15
    =>x=7
    Vậy x=7

  2. Giải đáp:
    a,10+3.(x-1)^ 3 = 5^ 5 : 5^3 + (-12)
    => 10+3.(x-1)^ 3 = 5^ (5 -3) -12
    => 10+3.(x-1)^ 3 = 5^2 – 12
    => 10+3.(x-1)^ 3 = 25-12
    => 10+3.(x-1)^ 3 = 13
    => 3.(x-1)^ 3 = 3
    => (x-1)^ 3 = 1
    =>  (x-1)^ 3 = 1^3
    => x-1=1
    => x=2
    Vậy x=2
    b,53+3.(x-15) = 29
    => 3.(x-15) = 29-53
    => 3.(x-15) = -24
    => x-15=-8
    => x=7
    Vậy x=7

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