angle pairs

7x + 20 + 5x + 2y + 7x + 20 + 90 = 360

19x + 2y + 130 = 360

19x + 2y = 230

 

7x + 90 + 20 = 180

7x = 70

x = 10

 

19x + 2y = 230

19(10) + 2y = 230

190 + 2y = 230

2y = 40

y = 20

7x + 90 + 20 = 180

7x = 70

x = 10

 

5x + 2y = 90

5 * 10 + 2y = 90

2y = 90 - 50

y = 20