The answer to the math worksheet "How does Toggle Toxx feel today?" is:
"With his hands"
Here's a pdf math worksheet page concerning linear equations and their graphs that will help you solve the puzzle.
Graphing linear equations is pretty simple, but only if you work neatly. If you're messy, you'll often make extra work for yourself, and you'll frequently get the wrong answer.
Learn basic concepts on systems of linear equations using graphs at Purplemath.com.
Can you solve Martin Gardner’s best mathematical puzzles? Try to find the answers to his most celebrated puzzles, featured at The Guardian.