In the given parallelogram
From the property of diagonals of Parallelogram
The diagonals are bisect each other into equal parts
So, according to the figure
length 2x= length of y
2x=y
Similarly for the second diagonal,
length y+4=length3x
y+4=3x
Simplify the both equation by substitution method,
In substitution method, substitute the value of any one varibale and put into the another equation and simplify
Now substitute the value of x=4 into the first equation and simplify for y
So the value of varriables x = 4 and y=8
Answer : A) x=4, y=8