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

Toán Lớp 6: a.x-36:18=12 b.5.5^x=625 c.440+2.(125-x)=546 d.846:[41-(7x-5)]=47 e.(4x-1)^2=25.9

Home/ Toán Lớp 6: a.x-36:18=12 b.5.5^x=625 c.440+2.(125-x)=546 d.846:[41-(7x-5)]=47 e.(4x-1)^2=25.9

Toán Lớp 6: a.x-36:18=12 b.5.5^x=625 c.440+2.(125-x)=546 d.846:[41-(7x-5)]=47 e.(4x-1)^2=25.9

Tháng Chín 13, 2022 Toán học 2 Comments 0 views

Toán Lớp 6: a.x-36:18=12
b.5.5^x=625
c.440+2.(125-x)=546
d.846:[41-(7x-5)]=47
e.(4x-1)^2=25.9

Comments ( 2 )

  1. thuminhthong
    thuminhthong
    13 Tháng Chín, 2022 at 1:43 chiều
    Reply

    .
    toan-lop-6-a-36-18-12-b-5-5-625-c-440-2-125-546-d-846-41-7-5-47-e-4-1-2-25-9

  2. quynhthanhnhu
    quynhthanhnhu
    13 Tháng Chín, 2022 at 1:43 chiều
    Reply
    @Chery
    a) x – 36 : 18 = 12
    => x – 2 = 12
    => x = 14
    b) 5 . 5^x = 625
    => 5x+1 = 5^4
    => x + 1 = 4
    => x = 3
    c) 440 + 2.( 125 – x ) = 546
    => 440 + 250 – 2x = 546
    => 690 – 2x = 546
    => 2x = 690 – 546
    => 2x = 144
    => x = 72
    d) 846 : [ 41 – ( 7x – 5 ) ] = 47
    =>( 41 – 7x + 5 ) = 846 : 47
    =>  41 – 7x + 5  = 18
    => 46 – 7x = 18
    => 7x = 28
    => x = 4
    e) ( 4x – 1 )^2 = 25.9
    => ( 4x – 1 )^2 = 225
    => ( 4x – 1 )^2 = 15^2
    => 4x – 1 = 15
    => 4x = 16
    => x = 4
     

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

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