Answer :
x is the number of weeks
your money = 80 + 6x, her money = 145 - 7x
her money = your money when 80 +6x = 145 - 7x
13x=65
x=5 weeks
your money = 80 + 6x, her money = 145 - 7x
her money = your money when 80 +6x = 145 - 7x
13x=65
x=5 weeks