Answer:

 

Equation

 

              75 + 25x = 400 – 40x     x = 5 weeks

 

Table

# of weeks

0

1

2

3

4

5

Jimmy

75

100

125

150

175

200

Jenny

400

360

320

280

240

200

 

Graph

          

 

 

Jimmy and Jenny will have the same amount of money in their accounts in 5 weeks.