Tolong Bantu ya pakai caranya!! terima kasih

21.
3x - 33 + 3x - 3 = 180
6x -36 = 180
6x = 180 + 36
x = 216 / 6
x = 36

4y - 5 + 3y - 25 = 180
7y = 180 + 30
y = 210 / 7
y = 30

x + y = 36 + 30 = 66

22.
y + 2y = 180
3y = 180
y = 180 / 3
y = 60

x = 2y
x = 2(60)
x = 120