Answer:
add then subtract the anwser
Step-by-step explanation:

The greatest common factor of 16, 60, & 90 would be 2.
28 + 18.25x = 161 -15x (here, x stands for every week this addition or withdrawal happens)
So:
28+18.25x = 161 - 15x
18.25x = 161 - 28 - 15x
18.25x = 133 - 15x
18.25x + 15x = 133
33.25x = 133
x = 133/33.25
x = 4
So, they will have the same balance in 4 weeks.
Answer:
I think the answer is 4
Step-by-step explanation:
8/10 / 1/5=4