Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 5: tìm x: 71+65=(x+140 phần x ) +260

Toán Lớp 5: tìm x: 71+65=(x+140 phần x ) +260

Comments ( 2 )

  1. 71 + 65 = {x + 140}/x + 260
    x/x + 140/x + 260 = 136
    1 + 140/x + 260 = 136
    1 + 140/x = 136 – 260
    1 + 140/x = -124
    140/x = -124 – 1
    140/x = -125
           x = 140 : -125
           x = -1,12
    #dtkc

  2. 71 + 65 = ( (x + 140)/x) + 260
    136 – 260 = ((x+140)/x)
    -124 = (x + 140)/x
    ⇒ -124 . x = x + 140
    -124 . x – x = 140
    ( -124 – 1) . x = 140
    -125 . x = 140
    x = 140 : (-125)
    x =  -1,12
    Vậy x = -1,12

Leave a reply

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

About Nguyệt