(3.x-72).372=13.69-39.23
(3.x-72).372=897-897
(3.x-72).372=0
3.x-72=0:372
3.x-72=0
3.x=72+0=72
x=72:3
x=24
chúc bạn học tốt nha
(3x—72) .372=13.69–39.23
(3x—72).372=897–897
(3x—72).372=0
3x—72=0:372
3x—72=0
3x=0+72
3x=72
x=72:3
x=24
\(\left(3x-72\right).372=13.69-39.23\)
\(\Rightarrow\left(3x-72\right).372=897-897\)
\(\Rightarrow\left(3x-72\right).372=0\)
\(\Rightarrow3x-72=0\)
\(\Rightarrow3x=72\)
\(\Rightarrow x=72:3\)
\(\Rightarrow x=24\)
Vậy x = 24
_Chúc bạn học tốt_
\(\left(3x-72\right)\times372=13\times69-39\times23\)
\(\left(3x-72\right)\times372=897-897\)
\(\left(3x-72\right)\times372=0\)
\(3x-72=0\div372\)
\(3x-72=0\)
\(3x=0+72\)
\(3x=72\)
\(x=72\div3\)
\(x=24\)
( 3x - 72 ) .372 = 13.69 - 39.23
(3x - 72 ) .372 = 897 - 897
(3x - 72 ) . 372 = 0
(3x - 72 )= 0 : 372
3x - 72 = 0
3x = 0 + 72
3x = 72
=> x = 72 :3
x = 24
