Question

Evaluate f(x) = 2x - 7 when x = 4.

Answer 1

`x = (11)/(2) \\`

Explanation:

f(x) = 2x - 7

when x = 4

It means that equate f(x) to the value of x that's 4 and solve for x

That's

f(x) = 4

We have

`2x - 7 = 4`

Add 7 to both sides of the equation

`2x + 7 - 7 = 4 + 7 \\ 2x = 11`

Divide both sides by 2

`(2x)/(2) = (11)/(2) \\`

We have the final answer as

`x = (11)/(2) \\`

Hope this helps you