Question

Write a function that makes the following true: f(5) = 10

*i got f(x)= 2x which is correct*

Solve your function when
f(x) = 5. *I need the answer for this*

Answer 1

Answer as a fraction: x = 5/2

Answer in decimal form: x = 2.5

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Step-by-step explanation:

Replace f(x) with 5

So we go from f(x) = 2x to 5 = 2x

Now isolate x. We do so by dividing both sides by 2 (this undoes the multiplication of 2 on x)

So we get

5 = 2x

5/2 = 2x/2 ... divide both sides by 2

5/2 = x

x = 5/2

x = 2.5