a,Đề bài....
=>12x-33=32020-2019
=>12x-33=3
=>12x=36
=>x=3
b,Đề bài.....
=>2x-3=7/3
=>2x=7/3+3
=>2x=16/3
=>x=8/3
c,Đề bài.....
=>(2x-25)=85:83
=>2x-32=85-3
=>2x-32=64
=>2x=96
=>x=48
d,Đề bài...
=>(6x-72):2=285
=>(6x-72)=142,5
=>6x=212,5
=>x=.......
Học\(tut\)
a) (12x-33)=3 b) 2x-3=21 c) 2x-2^5=64 d) (6x-72):2=285
12x=36 2x=24 2x=96 6x-72=570
x=3 x=12 x=48 x=107
Bài làm
a) ( 12x - 33 ) = 32020 : 32019
=> 12x - 33 = 3
=> 12x = 36
=> x = 36 : 12
=> x = 3
Vậy x = 3
b) ( 2x - 3 ) : 3 = 7
=> 2x - 3 = 21
=> 2x = 24
=> x = 12
Vậy x = 12
c) ( 2x - 25 ) . 83 = 85
=> 2x - 25 = 85 : 83
=> 2x - 32 = 64
=> 2x = 64 + 32
=> 2x = 96
=> x = 96 : 2
=> x = 48
Vậy x = 48
c) ( 6x - 72 ) : 2 - 84 = 201
=> ( 6x - 72 ) : 2 = 201 + 84
=> ( 6x - 72 ) : 2 = 285
=> 6x - 72 = 570
=> 6x = 570 + 72
=> 6x = 642
=> x = 642 : 6
=> x = 642 : 6
=> x = 107
Vậy x = 107
# Học tốt #
a) ( 12x - 33 ) = 32020 : 32019
12x - 33 = 32020 - 2019
12x - 33 = 31 = 3
12x = 3 + 33
12x = 36
x = 36 : 12 = 3
b) ( 2x - 3 ) : 3 = 7
2x - 3 = 7 . 3
2x - 3 = 21
2x = 21 + 3
2x = 24
x = 24 : 2 = 12
c) ( 2x - 25 ) . 83 = 85
2x - 25 = 85 : 83
2x - 32 = 85 - 3 = 82 = 64
2x = 64 + 32
2x = 96
x = 96 : 2 = 48
d) ( 6x - 72 ) : 2 - 84 = 201
( 6x - 72 ) : 2 = 201 + 84
( 6x - 72 ) : 2 = 285
6x - 72 = 285 . 2
6x - 72 = 570
6x = 570 + 72
6x = 642
x = 642 : 6
x = 107