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Grade 7 math · O.1 · One-step and two-step equations

One-step equations: add and subtract

Do the opposite operation to both sides to get x alone.

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See worked examples
  1. Solve for x: x − 7 = −1

    Answer: 6

  2. Solve for x: x − 2 = 9

    Answer: 11

  3. Solve for x: x + 6 = 7

    Answer: 1

Tip: Do the opposite operation to both sides to get x alone.

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