tolong di bantu ya!!

1. 3x + 4x + 96 = 180
7x = 180-96
7x = 84
x = 84/7
x = 12

2. 4x + 90 + 42 = 180
4x + 132 = 180
4x = 180 - 132
4x = 48
x = 48/4
x = 12

4. 2x + 2x + x = 180
5x = 180
x = 180/5
x = 36

5. 2x + 2x + 5x = 180
9x = 180
x = 180/9
x = 20