Emma is planning her summer and would like to work enough to travel and buy a new laptop. She can earn 90 dollars each day, after deductions, and she can work a maximum of 40 days in July and August, combined. She expects each day of travel will cost her 150 dollars and the laptop she hopes to buy costs 700 dollars.
Write a linear equation that represents the number of days Emma can work and travel and still earn enough for her laptop.
This is what I've come up with: 90d = 150p + 700, (Standard form: 90d - 150p -700 = 0) d represents days worked, and p represents travel days.
The question goes on to ask about how many days she will need to work she wants to travel, so I want to make sure i have to correct equation before I answer.