Answer:
a) 4 months
b) $600
Step-by-step explanation:
1. x - number of months the total amount paid to be the same for both stores.
2. That same amount for store A: [tex]300 + 75 \times x[/tex]
3. That same amount for store B: [tex]200 + 100 \times x[/tex]
4. Since it's the same amount for both stores we can make an equation:
- [tex]300+75\times x=200+100\times x[/tex]
- [tex]300-200=100x-75x[/tex]
- [tex]100=25x[/tex]
- [tex]x=4[/tex]
5. To find that same amount, we can use either side of above equation:
- [tex]300+75\times 4=600[/tex]
