Question

Hi, can you help me to solve this exercise please!

Answer 1

The function given is

`f(x)=15-3x`

We were asked to find all real values of x such that

`f(x)=0`

Therefore,

We will equate both values of f(x) together to get

`15-3x=0`

Subtract 15 from both sides

`\begin{gathered} 15-15-3x=0-15 \\ -3x=-15 \\ \text{divide both sides by -3,} \\ (-3x)/(-3)=(-15)/(-3) \\ x=5 \end{gathered}`

Therefore,

The value of x = 5