Please help me solve for x (show work)

-4/7x = -1

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?