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Course: 8th grade (Illustrative Mathematics) > Unit 4

Lesson 13: Lesson 16: Solving problems with systems of equations
Math
8th grade (Illustrative Mathematics)
Linear equations and linear systems
Lesson 16: Solving problems with systems of equations
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Systems of equations word problems

Google Classroom

Problem

Sterre charges $35 to file tax returns, but files for free if she only needs the easiest form. Then she donates $2 to clean water projects per tax return she files. Sterre charged $7,245 and made a donation of $1,242 this year for the tax returns she filed.
How many tax returns did Sterre file at each price?
Sterre filed
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
tax returns for free and filed
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
tax returns for $35 each.