Buna! Te voi ajuta eu.
[tex]1. (x-75) : 5 = 120\\\\\frac{x-75}{5} = 120\\\\x-75=600\\\\x=600+75\\\\x=675\\\\\\x=5625[/tex]
[tex]2. (100-x:75) x 35 + 1 = 876\\\\\\[/tex]
[tex]( 100 - \frac{1}{75} x) x 35 + 1 = 876[/tex] => X ul din paranteza nu e inmultire
[tex]3500 - \frac{7}{15} x + 1 = 876\\\\\\[/tex]
[tex]3501 - \frac{7}{15} x = 876\\\\52515-7x=13140\\\\-7x=13140-52515\\\\-7x=-39375\\\\[/tex]
Succes!
