Respuesta :

7(x-1)<35  
7x-7<35    (distrubute the 7 into the parrethases by multiplying)
7  +7  +7    (add 7 to 35)
          42    (get 42)
            7 = 6  (divide it by 7 and get answer)

its mostly about inverse operations which are when you see a multiplication you divide on the other side which in this case the indicator is the less than (like an equal sign)