Question

place answer my question ​

Answer 1

Answer:

plz mark it brainlist anwer

Answer 2

Answer:

Opposite angles in a cyclic quadrilateral is 180, So,

4y-4x+20=180

4y-4x=160 (equation 1)

3y-5-7x+5=180

3y-7x=180 (equation 2)

multiply equation 1 by 3 and equation 2 by 4 ,

12y-12x=480 (equation 3)

12y-28y=720 (equation 4)

subtract equation 3 and 4,

-12x+28x=480-720

x=(-15)

substitute x in equation 1,

4y-4(-15)=160

4y==160-60

y=25