The product of 4 and a number is 18 more than twice the number.
what is the number?

Which one ? is the answer and how to find this answer

50 people men and women were asked if they watched at least one sport on tv. 20 of the people surveyed are women, but only 9 of them watch at least one sport on tv. 16 of the men watch at least one sport on tv. make a a two-way table and a relative frequency table to represent the data.

Math i have no idea how to do a and b