If 3/5 are action and 1/4 are comedy then:
(3/5)+(1/4) are action or comedy
To add/subtract fractions you need a common denominator...
(3/5)*(4/4)+(1/4)(5/5)
(12/20)+(5/20)
17/20
So 17/20 (85%) of his collection are action or comedy not 4/9...
7n = n
If that is incorrect, then i am sorry
<span>Solución
X = {0, 121}
</span><span>espero que esto ayude</span>