Question

Evaluate 8y = 2x - 5 for f(x) = 0.

Answer 1

Here, $f\left(x\right)$ signifies $y$.
$\therefore f\left(x\right)=0\Rightarrow y=0$

Substituting $y$ we get,
$8\left(0\right)=2x-5$
$\Rightarrow 2x=5$
$\Rightarrow x=\frac{5}{2}=2.5$