tìm x biết
a , ( 27 . x + 6 ) : 3 – 11 = 9
( 15 – 6x ) . 3^5 = 3^6
740 : ( x + 10 )= 10^2 – 2 . 13
tìm x biết a , ( 27 . x + 6 ) : 3 – 11 = 9 ( 15 – 6x ) . 3^5 = 3^6 740 : ( x + 10 )= 10^2 – 2 . 13
By Emery
By Emery
tìm x biết
a , ( 27 . x + 6 ) : 3 – 11 = 9
( 15 – 6x ) . 3^5 = 3^6
740 : ( x + 10 )= 10^2 – 2 . 13
a ,$ ( 27 . x + 6 ) : 3 – 11 = 9$
$( 27 . x + 6 ) : 3 = 9 + 11$
$( 27 . x + 6 ) : 3 = 20$
$27 . x + 6 = 20.3$
$27 . x + 6 = 60$
$27x = 60 – 6$
$27x = 54$
$x = 54 : 27$
$x = 2$
_____________________________
$( 15 – 6x ) . 3^5 = 3^6$
$15 – 6x = 3^6 : 3^5$
$15 – 6x = 3 $
$6x =15- 3 $
$6x = 12$
$x = 12 : 6$
$x = 2$
_______________________________
$740 : ( x + 10 )= 10² – 2 . 13$
$740 : ( x + 10 )= 100 – 26$
$740 : ( x + 10 )= 74$
$x+10= 740 : 74$
$x+10 = 10$
$x =10 -10$
$x = 0$
a)( 27 . x + 6 ) : 3 – 11 = 9
( 27 . x + 6 ) : 3=9+11
( 27 . x + 6 ) : 3=20
27 . x + 6=20.3
27 . x+ 6=60
27 . x=60-6
27.x =54
x =54:27
x=2
_______________________________________
+)( 15 – 6x ) . 3^5 = 3^6
( 15 – 6x )=3^6:3^5
( 15 – 6x )=3^6-5
15 – 6x=3
6x =15-3
6x =12
x =12:6
x =2
_____________________________________
+)740 : ( x + 10 )= 10^2 – 2 . 13
740 : ( x + 10 ) =100-26
740 : ( x + 10 )=74
x + 10 =740:74
x+10 =10
x =10-10
x =0