Question

Kendra charges $11 to shovel a driveway. She shoveled 4 driveways on Saturday and then some more on Sunday. She made $143 for the weekend. How many driveways did she shovel on Sunday?

Answer 1

For this case, the first thing we must do is define a variable.
 We have then:
 x: amount of driveways shoveled on Sunday
 y: total amount
 We now write the equation that models the problem:
 $y = 11x + 44$
 She made $ 143 for the weekend:
 $143 = 11x + 44$
 From here, we clear the value of x:
 $11x = 143 - 44 x = 99/11 x = 9$
 Answer:
 She shoveled 9 driveways on Sunday