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[( 6x - 72 ) : 2 - 84 ] . 28 = 5628
( 6x - 72 ) : 2 - 84 = 5628 : 28 = 201
( 6x - 72 ) : 2 = 201 +84 = 285
6x - 72 = 285 . 2 = 570
6x = 570 + 72 = 642
x = 642 : 6
x = 107
Ta có: [ ( 6 . x - 72 ) : 2 - 84 ] . 28 = 5628
( 6 . x - 72 ) : 2 - 84 = 5628 : 28
( 6 . x - 72 ) : 2 - 84 = 201
( 6 . x - 72 ) : 2 = 201 + 84
( 6 . x - 72 ) : 2 = 285
6 . x - 72 = 285 . 2
6 . x - 72 = 570
6 . x = 570 + 72
6 . x = 642
x = 642 : 6
x = 107
Vậy x = 107
[(6.x-72) : 2 - 84 ] . 28= 5628
[(6.x-72) : 2 - 84] = 5628 :28
[(6.x-72) : 2 - 84] = 201
[(6.x-72) :2 = 201 + 84
[(6.x-72) : 2 = 285
[(6.x-72) = 285 . 2
[(6.x-72) = 570
6.x = 570 + 72
6.x = 642
x = 642 : 6
x = 107
(6.x-72):2-84=5628:28
(6.x-72):2-84=201
(6.x-72):2=201-84=117
6.x-72=117:2
6.x-72=58,5
6.x=58,5+72=130,5
x=130,5:6=21,75
[(6.x-72):2-84].28= 5628
(6.x-72):2-84=5628:28
(6.x-72):2-84=201
(6.x-72):2=201+84
(6.x-72):2=285
6.x-72=285.2
6.x-72=570
6.x=570+72
6.x=642
x=642:6
x=107
[ ( 6 x - 72 ) : 2 - 84 ] . 28 = 5628
(6x - 72) : 2 -84 = 5628:28=201
(6x-72):2=201+84=285
6x-72=285x2=570
6x=570+72=642
x=642:6
x=107
[ ( 6x - 72 ) : 2 - 84 ] . 28 = 5628
( 6x - 72 ) : 2 - 84 = 5628 : 28
( 6x - 72 ) : 2 - 84 = 201
( 6x - 72 ) : 2 = 201 + 84
( 6x - 72 ) : 2 = 285
6x - 72 = 285 x 2
6x - 72 = 570
6x = 570 + 72
6x = 642
x = 642 : 6
x = 107
[(6x − 72) : 2 − 84] . 28 = 5628
(6x – 72) : 2 – 84 = 5628 : 28
( 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
Vậy x = 107
\(\left[\left(6.x-72\right):2-84\right]\times28=5628\)
\(\left(6.x-72\right):2-84=5628:28\)
\(\left(6.x-72\right):2-84=201\)
\(\left(6.x-72\right):2=201+84\)
\(\left(6.x-72\right):2=285\)
\(6.x-72=285\times2\)
\(6.x-72=570\)
\(6.x=570+72\)
\(6.x=642\)
\(x=107\)
Tìm x, biết :
[( 6.x - 72 ) : 2 - 84 ] . 28 = 5628
( 6.x - 72 ) : 2 - 84 =5628:28
( 6.x - 72 ) : 2 - 84 = 201
( 6.x - 72 ) : 2 =201+84
( 6.x - 72 ) : 2 =285
6x - 72 = 285 . 2
6x - 72 = 570
6x=570+72
6x=642
x=642:6
x=107