x : 10 = 300 : 2
x : 10 = 150
x = 150 * 10
x = 1500
x : 10 = 300 : 2
x : 10 = 150
x = 150 . 10
x = 1500
x : 10 = 300 : 2
x : 10 = 300 : 2
x : 10 = 150
x =150 x 10
x = 1500
k nhanguyenthingochuyen
x : 10 = 300 : 2
x : 10 = 150
x = 150 x 10
x = 1500
x : 10 = 300 :2
x : 10 = 150
x = 150 . 10
x = 1500
x : 10 = 300:2
=> x : 10 = 150
=> x = 150 x 10
=> x = 1500
vậy x= 1500
đap số x = 1500