Answer: It will take 5 weeks for you and your friend to have the same balance.
Step-by-step explanation:
Let x be the number of weeks.
Total money saved = Money in saving account + (Money saved per week)×(Number of weeks)
For you, Total money saved = 135 + 12x
For your friend , Total money saved = 95 + 20x
W hen they have equal amount int heir account , then
[tex]135+12x=95+20x\\\\\Rightarrow\ 135-95=20x-12x\\\\\Rightarrow\ 40= 8x\\\\\Rightarrow\ x=\dfrac{40}{8}=5[/tex]
So, it will take 5 weeks for you and your friend to have the same balance.