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Từ biểu thức, suy ra:
[(6x-39)÷3]÷28=5628
<=>(2x-13):28=5628
<=>2x-13=158584
<=>2x=157597
<=>x=78798,5
Vậy x=78798,5
[(6x-39)÷3]÷28=5628
=> [(6x-39):3]= 157584
=> 6x-39=472752
=> 6x=472791
=>x=78798,5
Vậy x= 78798,5
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6x - 39 = 201
6x = 201 + 39
6x = 240
x = 240 : 6
x = 40
Vậy x = 40
Chúc bạn học tốt !
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[ ( 6x - 39 ) : 7 ] . 4 = 12
=> ( 6x - 39 ) : 7 = 12 : 4
=> ( 6x - 39 ) : 7 = 3
=> 6x - 39 = 3.7
=> 6x - 39 = 21
=> 6x = 21+39
=> 6x = 60
=> x = 10.
( x : 3 - 4 ) . 5 = 15
=> x : 3 - 4 = 15 : 5
=> x : 3 - 4 = 3
=> x : 3 = 7
=> x = 7.3
=> x = 21
x - [ 42 + (-28) ] = -8
=> x - 14 = -8
=> x = -8 + 14
=> x = 6.
[ (6x - 39): 7] . 4=12
(6x-39) : 7=12:4
(6x -39) :7=3
(6x-39) =3 . 7
6x-39 =21
6x =21 +39
6x=20
x=10
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[(6x-39):3] . 28 = 5628
(6x - 39) : 3 = 201
6x - 39 = 603
6x = 642
x = 107
a) 7.(x - 3) + 4 = 18
7. (x - 3) = 14
x - 3 = 2
x = 5
b) 2x - 13 = 201
2x = 214
x = 107
\(6x+x=28\)
\(7x=28\)
\(\Rightarrow x=4\)
Vậy \(x=4\)
6x+x=28
<=>7x=28
x=28:7
x=4
~G2k6~