To represent Jane's savings towards purchasing her bicycle, let's break down the components of her savings:
- The total cost of the bicycle is $185.
- Jane has already saved $50 from her birthday.
- She plans to save an additional $15 per week for \( w \) weeks.
The amount she saves after \( w \) weeks can be expressed as \( 15w \). Therefore, her total savings can be represented by the equation:
\[ 50 + 15w \]
To find out when she has enough money to purchase the bicycle, we set the total savings equal to the cost of the bicycle:
\[ 50 + 15w = 185 \]
This equation shows the relationship between the weeks she saves and the total cost of the bicycle.