Step-by-step explanation:
[tex] \frac{(5 {n}^{5} ) ^{3} }{( {n}^{2} ) ^{7} } = 875[/tex]
[tex] \frac{5 {n}^{15} }{ {n}^{14} } = 875[/tex]
[tex]5 {n}^{15 - 14} = 875[/tex]
[tex]5n \: = 875[/tex]
[tex]n \: = \frac{875}{5} [/tex]
Therefore n = 175
Hope it will help :)❤