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2 years ago

Find x if f(x) = 2x + 7 and f(x) = -1.

Mathematics

2 answers:

damaskus [11]2 years ago

7 0

The answer is positive 5

skelet666 [1.2K]2 years ago

5 0

Answer:

$x=-4$

Step-by-step explanation:

We are given the function:

$f(x)=2x+7$

And we want to find <em>x</em> when f(<em>x</em>) = -1.

Substitute:

$-1=2x+7$

Subtract seven from both sides:

$2x=-8$

Divide both sides by two. Hence:

$x=-4$

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