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TEAS MathematicsUndo in reverse order

Solving Multi-Step EquationsATI TEAS 7 cheat sheet

Undo in reverse order

9 key facts 4 practice questions Reviewed Oct 2026
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The Order

  • Distribute first, if there are parentheses
  • Combine like terms on each side
  • Undo addition/subtraction next
  • Undo multiplication/division last

Worked

  • 2x + 5 = 17 → 2x = 12 → x = 6
  • 3(x − 4) = 18 → 3x − 12 = 18 → 3x = 30 → x = 10

Variables Both Sides

  • Move all variables to one side first
  • 5x − 3 = 2x + 9 → 3x = 12 → x = 4

Check

  • Plug it back in — the two sides must be equal
Key takeaway

Undo in reverse order

Before you read

Test yourself first: 4 questions

Question 1 of 4

What is 2/3 × 3/4?

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