X : 0,5 + X x 10 = 24
X x 2 + X x 10 = 24
x = 24 : ( 2 +10 )
x = 2
x : 0,5 + x × 10 = 24
x : 1/2 + x × 10 = 24
x × 2 + x × 10 = 24
x × 12 = 24
x = 24 : 12
x = 2
Vậy x = 2
x : 0,5 + x × 10 = 24
x : 1/2 + x × 10 = 24
x × 2 + x × 10 = 24
x × 12 = 24
x = 24 : 12
x = 2
Vậy x = 2