Question

1) |n+4|=-3
2) |7n-28|=0
3) |3n-27|=0
4) 4x|n|+5=45
5) 2x(|n|+1+|n|)=30
n=?
Sper ca se intelege ca |n| inseamna modul de n

Answer 1

(1) n=-7 (2)|7n|=28deci n=4 (3) |3n|={27,-27} deci n=9 (4) 4*|n|=40 deci n=10 (5) |n|+1+|n|=15 => |2n|=14 => n=7