Question

Caitlin had $402 in her bank account. She withdrew $15 each week to pay for a swimming lesson. She now has $237.
a. Write an equation that can be used to find the number of swimming lessons that she paid for.
b. How many swimming lessons did she pay for?
c. At the time she has $237, the cost of a lesson rose to $19. How many lessons can she pay for with her remaining $237?

Answer 1

A) Equation:

($402 - $237) ÷ $15 = y

B) Solution:

$402 - $236 = $165

$165 ÷ $15 = 11

Answer: 11 Swimming Lessons

C) Equation:

$237 ÷ $19 = 13

Answer: 13 Swimming Lessons

Answer 2

a.) Let x be the number of swimming lessons she had, then
402 - 15x = 237

b.) 15x = 402 - 237 = 165
x = 165/15 = 11
She had 11 swimming lessons

c.) Let the number of lesson she had be y, then 19y = 237
y = 237/19 = 12 lessons
She can pay for 12 lessons with her remaining $237.