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 6: 15.(x-4)=45 x-10=-65 -125+(x+125)=-25 2.2^x=2^8

Toán Lớp 6: 15.(x-4)=45
x-10=-65
-125+(x+125)=-25
2.2^x=2^8

Comments ( 2 )

  1. 15.(x-4)=45
    x-4=45:15
    x-4=3
    x=3+4
    x=7
    x-10=-65
    x=-65+10
    x=-55
    -125+(x+125)=-25
    x+(125-125)=-25
    x+0=-25
    x=-25-0
    x=-25
    2.2^x=2^8
    2^x=2^8:2
    2^x=2^7
    Vậy x=7
     

  2. Giải đáp + Lời giải và giải thích chi tiết:
    $\text{a/ 15. (x – 4) = 45}$ $\\$ $\text{x – 4 = 45 : 15}$ $\\$ $\text{x – 4 = 3}$ $\\$ $\text{x = 3 + 4}$ $\\$ $\text{x = 7}$ $\\$ $\text{b/ -125 + (x + 125) = -25}$ $\\$ $\text{-125 + x + 125 = -25}$ $\\$ $\text{(-125 + 125) + x = -25}$ $\\$ $\text{x = -25}$ $\\$ $\text{c/ 2. $2^{x}$ = $2^{8}$}$ $\\$ $\text{$2^{x}$ = $2^{8}$ : 2}$ $\\$ $\text{$2^{x}$ = $2^{7}$}$ $\\$ $\text{⇒ x = 7}$
     

Leave a reply

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