( 81 + 2 x) : 5 = 25
81 + 2x = 25 . 5
81 + 2x = 125
2x = 125 - 81
2x = 24
x = 24 : 2
x= 12.
Tích nha
(81+2x):5=25
81 + 2x= 25 x 5
81 + 2x=125
2x=125-81
2x=44
x=44:2
x=22
(81 + 2x) : 5 = 25
81 + 2x = 25 x 5
81 + 2x = 125
2x = 125 - 81
2x = 44
x = 44 : 2
x = 22
(81+2X):5=25
81+2X =25x5
81+2X = 125
2X =125-81
2X =44
X =44:2
X =22
dễ mà t cho mik nha
(81+2x):5=25
81+2x =25.5
81+2x =125
2x =125-81
2x =44
x =44:2
x =22