Question

For f(x) = 2x + 8, find x when f(x) = -7. Type a numerical answer in the space provided. If necessary, use the / key to represent a fraction bar. Do not include spaces in your answer. a0

Answer 1

Answer: Answer was found at TigerAlgebra.com

Explanation:

x = -4

Answer 2

The value of x is
`-(15)/(2)`.

Explanation:

The given function is

`f(x)=2x+8`

We need to find the value of x when f(x)=-7.

Substitute f(x)=-7 in the given function.

`-7=2x+8`

Subtract 8 from both sides.

`-7-8=2x+8-8`

`-15=2x`

Divide both sides by 2.

`-(15)/(2)=(2x)/(2)`

`-(15)/(2)=x`

Therefore, the value of x is
`-(15)/(2)`.