Question

ABCD is a cyclic quadrilateral such that A=4y+20,B=3y-5,C=4x and D=7x+5 find the four angles​

Answer 1

Answer:

x=25,y=15

Step-by-step explanation:

A+C = 180

B+D = 180

4y+20+4x=180

x+y=40 (1)

3y-5+7x+5=180

7x+3y=180 (2)

solve (1) &(2) by substitution:

-7x-7y=-280

7x+3y=180

-4y=-100

y=25

x+25=40

x=15