( X - 90 ) : 30 = 4
X - 90 = 4 x 30
X - 90 = 120
X = 120 + 90
X = 210
~ Chúc bạn hok tốt ~
(x-90):30=4
(x-90) =30x4
(x-90) =120
x =120-90
x =30
k nha
( x - 90 ) : 30 = 4
x - 90 = 4 x 30
x - 90 = 120
x = 120 + 90 = 210
Ta có
( X - 90 ) : 30 = 4
X - 90 = 4 x 30
X - 90 = 120
X = 120 + 90
X = 210
hok tốt
trả lời:
(x-90):30=4
x-90 =4.30
x-90 =120
x =120-90
x =30