g(a) = 16  just means to evaluate g(x) when x=a, so they are saying



g(a) = 3a - 5 = 16

Solve 3a-5=16 for a to get a=7.   



Hope this helps you.

 

Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
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For g(x) = 3x - 5 and g(a) = 16, find a. 

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