[ Answer ]

[ Explanation ]
Area = 1420
Width = 
Area For Rectangle: Length · Width
Use division to find width:
1420 ÷ 
Convert mixed numbers to fractions:
1420 = 
= 
÷ 
Use mixed multiplication:

= 
Simplify:
= 
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First, we should add 1 to both sides to isolate the variable:
3x = 12
Now that x is isolated, we divide by 3:
x = 4
The answer is C. Hope this helps
Answer:
8. A, B
9. C (2, 1)
Step-by-step explanation: