Combine similar terms (constants; terms that end in x; etc).
In the first case, you end up with
1 + 2x = x - 4 + 2z
which can be rewritten
5 + x = 2z
i don't understand how to do these
1+3x-x=x-4+2z
3+3x-(x-2)=3x+4
1 answer