Which equation has the solution x=4?

A)4x=20

B)8=8
2

C)x+8=3x

D) x= x+5
2

Also there’s a picture of the question because on text it doesn’t make sense

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?