Answer:
The width of rectangle is
or 
Step-by-step explanation:
we know that
The perimeter of rectangle is equal to

where
L is the length of rectangle
W is the width of rectangle
we have

substitute

solve for x





simplify

<em>Find the width of rectangle</em>

substitute the value of x

Convert to mixed number

Answer:
1.083
Step-by-step explanation:
2.75-(9+6)/9
(180-144)° + 3x + 90° = 180°
36 + 3x + 90° = 180°
x = 18°