Answer:
a: 
Step-by-step explanation:
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Unknown values can be taken as anything , for example : the most common is x for unknown values and sometimes, for angles we can take θ(theta).
it is totally upto you!
Answer:
Step-by-step explanation:
Im sorry i dont really know ur anwer. Hope someone else can help you.
Answer:
add 64 to both sides
Step-by-step explanation:
x = -26.3