For this case we find the expression that represents the cost of each printing press.
x: Be the variable that represents the number of programs to print
So:
Cost 1: Janet’s Print Shop
![C (x) = 0.25x + 35](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9lk02dmgyd7x5gvb3rjju65s0glxgxl7x8.png)
Cost 2: The Printing Press
![C (x) = 0.15x + 50](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6wbivfwm5ntmdfqpnd2hkaxoymiu5joq86.png)
If we want to find the number of programs for which the costs are the same, then we equate both equations:
![0.25x + 35 = 0.15x + 50\\0.25x-0.15x = 50-35\\0.1x = 15\\x = \frac {15} {0.1}\\x = 150](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9jorxyvhenkvo3ako7gqoqjvncfqa7qx2b.png)
Thus, for 150 programs the cost is the same.
Answer:
For 150 programs the cost is the same.