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Year 9 maths · A.4 · Linear Equations

Solve one-step equations with adding and subtracting

Do the opposite operation to both sides.

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See worked examples
  1. Solve for x: 9 + x = 3

    Answer: -6

  2. Solve for x: x − 9 = −5

    Answer: 4

  3. Solve for x: x − 12 = −6

    Answer: 6

Tip: Do the opposite operation to both sides.

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