tolong jawab ya kakak kakak

1. 180 - 129 = 51
2. 180 - 87 = 93
3. 180 - 80 = 100/2 = 50
4. 90 - 30 = 60
5. A. X = 180 - 120 = 60
B. Y = 120 (karena berhadapan maka senilai)
C. 120 + 60 = 180
6. A. 3x + 6x = 9x
9X = 90
X = 10
B. 3(10) = 30
7. A. 2y + 4y = 6y
6y = 180
y = 30
B. 2(30) = 60
C. 4(30) = 120

semoga membantu dan mohon maaf jika salah ^_^