please help me,
thank you

Answer:
X=30
Step-by-step explanation:
[tex]a + b \: + c + d = \: 360 \\ 3x - 10 + 2x + 8 + 3x + 4x + 2 \\ = 12x = 630 \\ x = 360 \div 12 \\ x = 30[/tex]