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This is what I would call a Level II Elimination activity. No variable is automatically eliminated, and you have to multiply both equations about half the time to eliminate it.
Riddles are a great way to make a boring worksheet fun. However, I found students knew the answer to the riddle and just chose the answers to fill in the letters without doing any of the math. This way, students have to create the riddle before they can answer it.
* Perfect for centers, homework or independent/group practice
* Engaging activity for students to practice
* Answer Key included