Question

Slove the equation f-(-4)=12f =-8f =16f =8f = -9

Answer 1

Given the equation:

`f-(-4)=12`

The first thing to do is get rid of the parenthesis, since there is a negative sign outside of them, the content will change it's sign:

`\begin{gathered} f-(-4)=12 \\ \Rightarrow f+4=12 \end{gathered}`

Now, we pass the 4 to the other side of the equation changing it's sign again:

`\begin{gathered} f+4=12 \\ \Rightarrow f=12-4=8 \\ f=8 \end{gathered}`

therefore, f=8