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28-04-2020
Mathematics

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If f(x) = x + 5, for what value of x does f(4x) = f(x + 4)?

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keziakh004 keziakh004

28-04-2020

Answer:

x = 4/3

Step-by-step explanation:

To solve find f(4x) and f(x+4). You should get f(4x) = 4x + 5 and f(x+4) = x + 9. Now, set the two equations equal to each other.

f(4x) = f(x + 4)

4x + 5 = x + 9

3x = 4

x = 4/3

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