If 15x + 12y = 90 then 5x + 4y = ? A) 72
B) 80
C) 14
D) 10
E) 9
With steps pleaseee

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120