Part 1
we have
58n - 8 = 80
solve for n
adds 8 both sides
58n=80+8
58n=88
Divide by 58 both sides
n=88/58
simplify
n=44/29
Part 2
we have
5(6n + 2) = - 38 + 6n
solve for n
Apply distributive property left side
30n+10=-38+6n
Group terms
30n-6n=-38-10
24n=-48
Divide by 24 both sides
n=-48/24
n=-2