Answer:
1/3
Step-by-step explanation:
(5 + 4 + 3 + 3) x 2 = 30
Multiplied by two because two marbles are being picked.
10/30 = 1/3
d = (R+3)(M)
d/M - 3 = R
Add 3 both sides
d/M = R+3
Multiply M both sides
Hope this helps!
That would turn into 3x-5