Find the number of pairs \(\displaystyle (n_1,n_2)\) that satisfies the equation below:
\(\displaystyle n_1 + n_2 = x\; \; \) where \(\displaystyle n_1 ,n_2 ,x \in \mathbb{N}\)

Find the number of pairs \(\displaystyle (n_1,n_2)\) that satisfies the equation below:
\(\displaystyle n_1 + n_2 = x\; \; \) where \(\displaystyle n_1 ,n_2 ,x \in \mathbb{N}\)