Question

What is the value of x if f(x)=23

Answer 1

Functions can be represented by equations, tables and graphs.

The value of x if $\mathbf{f(x) = 2x + 3}$ is 10

The given parameter is:

$\mathbf{f(x) = 23}$

The function f(x) is not given,

So, I will use an assumed expression for f(x).

Assume that:

$\mathbf{f(x) = 2x + 3}$

So, we have:

$\mathbf{2x + 3 = 23}$

Subtract 3 from both sides

$\mathbf{2x = 20}$

Divide both sides by 2

$\mathbf{x = 10}$

Hence, the value of x if $\mathbf{f(x) = 2x + 3}$ is 10

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