4 years ago

Given the function f(x) = 2(x + 4), find x if f(x) = 20.

1 answer:

QveST [7]4 years ago

3 0

$f(x)=2(x+4)\\\\f(x)+20\to2(x+4)=20\ \ \ |:2\\\\x+4=10\ \ \ \ |-4\\\\\boxed{x=6}$

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