60 la sai minh thi roi 55 moi dung

Bằng 0 

Bạn k mk nha

200@ do

tra loi di

198 nha k di

x + 20 = 100 x 5

x + 20 = 500

x          = 500 - 20

x          = 480

400 + 600 + 1000 + 200

= 1000 + 1000 + 2000

= 2000 = 2000

= 4000

TK cho mik nha

\(\sqrt{4x^2+4x+1}=6\)

\(\Leftrightarrow\sqrt{\left(4x+1\right)^2}=6\)

\(\Leftrightarrow\left|4x+1\right|=6\)

\(\Leftrightarrow4x+1=6\)

\(\Leftrightarrow4x=6-1\)

\(\Leftrightarrow4x=5\)

\(\Leftrightarrow x=\frac{5}{4}\)

Vậy S = \(\left\{\frac{5}{4}\right\}\)

146,34 - 23,12 - 46,34

= ( 146,34 - 46,34 ) - 23,12

= 100 - 23,12

= 76,88