As we know that $$\frac{1}{0} = ∞ \implies \frac{1}{∞} = 0 \implies 1 = 0.∞$$ Now let $x=0$ and $y=0$ then $$x+y=0 \implies \frac{x+y}{1}=0 \implies \frac{x+y}{0}=1$$ and $x+y=0$ so $$\frac{0}{0}=1$$ Similarly, as $\frac{2}{2}=1$ and $\frac{5}{5}=1$

Now we know that any number multiply by zero is equal to zero so $$ (2)0 = 0 \rightarrow(1)$$ And $$\frac{0}{0} = \frac{0}{0}$$ By eq(1) $$\frac{(2)0}{0} = \frac{(1)0}{0}$$ $$2\frac{0}{0} = 1\frac{0}{0}$$ as $\frac{0}{0} = 1$ then $$2(1) = 1(1)$$ $$2 = 1$$