I do not know the first one, but the second one is variable and the last one is a constant
The two parallel lines are FL and GK, on the right side of the shape. The other line is perpendicular to them.
The answer for your question is 2
Addition
A. X=12
B. S=10
C. Y=34
D. T=12
Subtraction
A. X=8
B. S=2
C. Y=14
D. T=6
Answer:
Area of Rectangle = length times width
lets say length = 2x-4
width = x+5
Note: you can switch these around, width could be 2x-4 and length could be x+5, it doesnt matter.
With that being said:
length * width = area
(2x-4)(x+5)=area