[( 4x - 24 ) : 5 ] . 42 = 45
( 4x - 24 ) : 5 = 45 : 42
( 4x - 24 ) : 5 = 43 = 64
4x - 24 = 64 . 5
4x - 24 = 320
4x = 320 + 24
4x = 344
x = 344 : 4
x = 86
vậy x = 86
\(\left[\left(4x-24\right):5\right]=4^5:4^3\\ \left[\left(4x-24\right):5\right]=4\\ \left(4x-24\right)=4.5\\ 4x-24=20\\ 4x=44\\ x=44:4=11\)
\(\left[\left(4x-24\right):5\right].4^3=4^5\)
\(\left[\left(4x-24\right):5\right]=4^5:4^3\)
\(\left[\left(4x-24\right):5\right]=4^2\)
\(4x-24=4^2.5\)
\(4x-24=16.5\)
\(4x-24=80\)
\(4x=80+24\)
\(4x=104\)
\(x=104:4\)
\(x=26\)
[( 4x - 24 ) : 5 ].43 = 45
[( 4x - 24 ) : 5 ] = 45 : 43
[( 4x - 24 ) : 5 ]= 42
[( 4x - 24 ) : 5 ] = 16
(4x - 24 ) = 16 . 5
(4x- 24 ) = 80
4x= 80 + 24
4x=104
x=104:4
x=26
vậy x = 26