Answer:
1/2
Step-by-step explanation:
1/3 equals 2/6
3/6 + 1/6 = 3/6
3/6 = 1/2
first term = a = 3
common ratio = 2nd term ÷ first term
= 12 ÷ 3
r = 4
125
Answer: X = 18
Crossmultiply