Here is my attempt to demonstrate that 1=0.
1) 0=0
2) 0=1−1
3) n⋅0=n(1−1), n is a big natural number.
4) 0=n times(1−1)+(1−1)+...+(1−1)
5) 0=1−1+1−⋯−1
6) 0=1−(1−1+1−1+⋯)
7) 0=1−((1−1)+(1−1)+⋯+(1−1))
8) 0=1−(0+0+⋯+0)
9) 0=1
In which step is the first error committed?