756 is your answer Hope this helps
Answer:
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Step-by-step explanation:
a) x=14°
b) x=23°
For this case we have the following system of equations:

From the first equation we have:

We substitute in the second equation:

We subtract 5 from both sides of the equation:

We divide -2 on both sides of the equation:

So:

So, the system solution is: 
Answer:
See attached image 