If g(x) = -3x + 1, find x if g(x) = 16.

I get how to do this but I do not know how to this problem.
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3 Answers

Replace g(x) by 16: 16=-3x+1, so 3x+16=1, 3x=-15, x=-5.
by Top Rated User (1.2m points)
Just plug in 16 where x is in the original equation.
by

f(x)=23 f(x)=x2 + 7

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