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: (x+1)+(x+2)+(x+3)+(x+4)+(x+5)=40

Toán Lớp 5: (x+1)+(x+2)+(x+3)+(x+4)+(x+5)=40

Comments ( 2 )

  1. (x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) = 40
    x + 1 + x + 2 + x + 3 + x + 4 + x + 5 = 40
    (x + x + x + x + x) + (1 + 2 + 3 + 4 + 5) = 40
    5x + 15 = 40
    5x = 40 – 15 = 25
    x = 25 : 5 = 5

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    (x+1)+(x+2)+(x+3)+(x+4)+(x+5)=40
    x+1+x+2+x+3+x+4+x+5=40
    (x+x+x+x+x)+(1+2+3+4+5)=40
    5x+15=40
    5x=25
    =>x=5

Leave a reply

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

About An Kim