(y-21x13):11=30
y-273=30x11
y-273=330
y=330+273
y=603
(y-21x13):11=30
y-273=30x11
y-273=330
y=330+273
y=603
MIK NHANH NHAT!
( y - 273 ) = 30 x 11
( y - 273 ) = 330
y = 330+ 273
y = 603
vậy y = 603
( y - 21 x 13 ) = 30 x 11
( y - 21 x 13 ) = 330
y - 273 = 330
y = 330 + 273
y = 603
Vậy y = 603