−3z−(−z−2)
simplified exspression pls

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

True or false look at the picture pls : /