Răspuns :
[(3×N+5)×3+5]×3+5=173
[(3n+5)*3+5]*3=168
(3n+5)*3+5=56
(3n+5)*3=51
3n+5=17
3n=12
n=4
[(3×N+5)×3+5]×3+5=173
=[(3×N+5)×3+5]×3=173-5
=[(3×N+5)×3+5]×3=168
=[(3×N+5)×3+5]=168÷3
=[(3×N+5)×3+5]=56
=(3×N+5)×3=56-5
=(3×N+5)×3=51
=3×N+5=51÷3
=3×N+5=17
=3×N=3N
3N= 17-5
3N= 12
N = 12÷3
N= 4
Sper ca te-am ajutat!