Can someone me ? i found x but i’m confused on how to find y

Can someone me and do the problem plz so i can understand it more better

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.