a) 2840 + [(999 - 9x) : 60 ] .24 = 3200
=> [(999-9x) : 60 ] . 24 = 2840 - 3200 = -360
=> (999 - 9x) = \(\frac{-360}{24}=-15\)
=> 9x = 999 - ( - 15) = 999 + 15 = 1014
=> x = \(\frac{1014}{9}=\frac{338}{3}\)
b) (3x - 48) . 6 = 33.22 - 23.32
(3x - 48) . 6 = 27 . 4 - 8 . 9
(3x -48).6 = 36
(3x - 48 = 36 : 6 = 6
3x = 54
x = 54 : 3 =18
t ick cho mik nha
1)
a) 2840 + [(999-9x) :60] . 24=3200
[(999-9x): 60] . 24=3200- 2840= 360
(999-9x) : 60= 360 : 24
(999-9x) : 60= 15
999-9x =15 . 60
999-9x =900
9x= 999-900=9
x=9:9=1
b) (3x - 48).6= 33.22-23.32
(3x-48).6 = 27.4-8.9
(3x - 48)6 = 108-72
(3x - 48)6 = 36
(3x-48) = 36:6=6
3x = 6 + 48
3x=54
x=54:3=18
mys and ma kết ko biết trả lời thì thôi đùng lầm bậy