4 - ( 27 - 3 ) = x - ( 13 - 4 )
<=> 4 - 24 = x - 9
<=> -20 = x - 9
<=> x = -11
4 - (27 - 3) = x - (13 - 4)
=> x - (13 - 4) = 4 - (27 - 3)
=> x - 9 = 4 - 24
=> x - 9 = - 20
=> x = - 20 + 9
=> x = - 11
Vậy x = - 11
4 - ( 27 - 3 ) = x - ( 13 - 4 )
x - ( 13 - 4 ) = 4 - ( 27 - 3 )
x - 9 = 4 - 24
x - 9 = -20
x = -20 + 9
x = -19
Vậy x = -19
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