Question

If anyone can help me with this that would be great!!!

Answer 1

It will take 10 mouths

Answer 2

90 + 10m = 50 + 15m

subtract 10 m from each side

90 = 50 + 5m

subtract 50 from each side

40 = 5m

divide by 5

8 =m

Answer: at 8 months the cost will be the same