[(19x-13):27-13]:50=100
(19x-13):27-13 = 100.50
(19x-13):27-13 = 5000
(19x-13):27 = 5000 + 13
(19x-13):27 = 5013
19x-13 = 5013 . 27
19x-13 = 135351
19x = 135351 + 13
19x = 135364
x = 135364 : 19
x = 135364/19
[(19x-13):27-13]:50=100
(19x-13):27-13=100.50
(19x-13):27-13=5000
(19x-13):27=5000+13
(19x-13):27=5013
19x-13=5013.27
19x-13=135351
19x=135351+13
19x=135364
x=135364:19
x=tap hop rong
xin loi ket qua giong ban tren moi dung, minh quen viet thanh phan so