Forming-Equations-From-Words Edexcel Higher

Forming linear equations

How do I form expressions from words?

• You can turn common phrases into expressions

  • Use x to represent an unknown value

    2 less than “something”
    Double “something”
    5 lots of “something”
    3 more than “something”
    Half of “something”

• Common words indicating basic operations are:

  • Addition: sum, total, more than, increase

  • Subtraction: difference, less than, decrease

  • Multiplication: product, lots of, times as many, double, triple

  • Division: shared, split, grouped, halved, quartered

• Brackets help keep the order correct

  • “something” add 1, then multiplied by 3

    • which simplifies to <img alt=”3 left parenthesis x plus 1 right parenthesis” data-mathml='<math ><semantics><mrow><mn>3</mn><mo>(</mo><mi>x</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow><annotation encoding=”application/vnd.wiris.mtweb-params+json”>{“language”:”en”,”fontFamily”:”Times New Roman”,”fontSize”:”18″}</annotation></semantics></math>’ height=”22″ role=”math” 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