C.
No, it is not fair, and the reader better use discretion while viewing it.
multiply the top equation by 3, multiply the bottom equation by 4, then subtract the bottom equation from the top equation
multiply the top equation by 3, multiply the bottom equation by -2, then add the equations
Use 5 as the lowest common factor and you gt 3/20
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The best and most correct answer among the choices provided by the question is <span>A.an = 20 + (n - 1)(6)</span> .<span>
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Hope my answer would be a great help for you.</span>
