Question

Solve: −4x > 30, when x ∈ N 

Answer 1

\[- 4x > 30\]
\[ \Rightarrow x < - \frac{30}{4} (\text{ Dividing both the sides by } - 4)\]
\[ \Rightarrow x < - \frac{15}{2}\] 

\[x \in N\]
\[\text{ Then, the solution of the given inequation is } \phi . \]