\(\left[3.\left(70-x\right)+5\right]:2=46\)
=> \(3.\left(70-x\right)+5=92\)
=> \(3.\left(70-x\right)=87\)
=> \(70-x=29\)
=> \(x=41\)
[ 3 . ( 70 - x )+ 5 ]: 2 = 46
[ 3 . ( 70 - x )+ 5 ] = 46 . 2
[ 3 . ( 70 - x )+ 5 ] = 92
3 . ( 70 - x ) = 92 - 5
3 . ( 70 - x ) = 87 : 3
70 - x = 29
x = 70 - 29
x = 41
# CHUC BAN HOK TOT
\(\left[3.\left(70-x\right)+5\right]:2=46\)
\(\Rightarrow\left[3.\left(70-x\right)+5\right]=46.2=92\)
\(\Rightarrow3\left(70-x\right)=92-5=87\)
\(\Rightarrow70-x=73:3=29\)
\(\Rightarrow x=70-29=41\)
Vậy x = 41
Chúc em học tốt nhé!
[3.(70-x)+5]:2=46
=[3.(70-x)+5]=46.2
=[3.(70-x)+5]=92
=3.(70-x)=92-5
=3.(70-x)=87
70-x=87:3
70-x=29
x=70-29
x=41
