Answer:
Width of brand name television = 18 inches
Height of brand name television = 36 inches
Step-by-step explanation:
Given,  
Width of generic TV = 12 inches  
Height of generic TV = 24 inches
Let the width of brand name television = W
Let the height of brand name television = H
As given in question,  
Size of generic television = 2/3  of the size of the brand name television  
Thus,  
2/3 W = 12 inches  
2/3 H = 24 inches  
On solving the given equations, we get –  
W = (12 x 3)/2 = 18 inches
H = (24 x 3)/2 = 36 inches
Width of brand name television = 18 inches
Height of brand name television = 36 inches