Answer:
d = 78
r = 32
x = 24
Step-by-step explanation:
13 = d / 6
d = 16 x 3
24 = 3r/4
3r = 24 x 4
3r = 96
r = 96 / 3
5x / 6 = 20
5x = 6 x 20
5x = 120
x = 120 / 5
Hope that helps!