Please answer these two questions precisely :)

  1. using the expression 7x = 3y, if y is 35, what is x?
A15
B21
C35
D105
  1. Bruce has 97 sports cards. 34 of them are football cards. Which equation can be used to find the number of sports cards y that are not football cards?
A97 + 34 = y
By + 97 = 34
C34 + y = 97
Dy - 97 = 34