Answer:
x = 27
Step-by-step explanation:
[tex]30 \degree = \frac{1}{2} \{(5x + 10) \degree - (3x + 4) \degree \} \\ 30 \degree \times 2= \{(2x + 6) \degree \} \\ 60 \degree = (2x + 6) \degree \\ 60 = 2x + 6 \\ 2x = 60 - 6 \\ 2x = 54 \\ x = \frac{54}{2} \\ \huge \red { \boxed{x = 27}} \\ [/tex]
