Since the shape is a quadrilateral, the interior angles add to 360 degrees. Thus, angle C is 360 - 82 - 92 - 102 = 84 degrees.
108 sodas, you subtract the 30 from the 138 and thus 108.
5(x + y) - 3(x - y)
5x + 5y - 3x + 3y
5x - 3x + 5y + 3y
2x + 8y
5(x + y) - 3(x - y) = 2x + 8y
Answer: equation: y=-4x+1
slope: -4
y intercept:1
2/1 = 14/x
cross mulitply
2x=14
2x/2=14/2
x=7
The width is 7 cm