Use the figure below for #15 - 16. PQ = 4x - 5, QR = 6x + 25, PR = 100. I don’t know how my teacher got 5 for x. I just want to see the step-by-step answer because I want to study for the test. Thank you in advance.

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!