Answer:
15.
Step-by-step explanation:
We have the proportion
\(\frac{x}{35}=\frac{3}{7}\)
using the cross multiplication we have that
7x =3*35
7x = 105
x = 105/7
x = 15.
Then, with x=15 we have that the proportion
\(\frac{15}{35}=\frac{3}{7}\)
is true. You can check it, if you divide the numerator and the denominator of 15/35 by 5, you will obtain 3/7.
