Answer:
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Step-by-step explanation:
2.5
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The correct answer is the first option.
If you want to use elimination, you can sum the two equations for example, so that the x's simplify:



Plug this value for y in one of the equations to derive the value of x:

So, the solution is 
D 288 because 216/3 equals 72 times that by 4 and you get 288.