6210 : (x - 23) = 30
x - 23 = 6210 : 30
x - 23 = 207
x = 207 + 23
x = 230
(x + 27) : 12 = 15
x + 27 = 15 x 12
x + 27 = 180
x = 180 - 27
x = 153
mik nhah nhất nha
x-25=6210:30
x-25=207
x=207+25
x=232
a) x-25= 6210 : 30
x-25 = 207
x= 207+25
x= 232
b) x+27= 15x12
x+27= 180
x= 180-27
x= 153
a) 6210: (x-25)=30
(x-25)=5210 : 30
(x-25)=207
x= 207+25
x=232
(x+27) :12 = 15
x+27 = 15x12
x+27 = 180
x = 180-27
x =153