Maths

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  • Created by: 11btaylo
  • Created on: 11-11-15 12:01
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  • Maths - Higher Revision
    • Solving Equations:
      • To solve an equation you have to find the value of X
      • A simple example: 2n+1=n+4 2n=n+3 n=3
        • To solve the equation you have to do the inverse operation.
      • Equations including brackets would mean that you have to expand the brackets first.
        • For example: 2(x+7)=5(3x+8)
          • After expanding the brackets: 2x+14=15x+40
            • Then continue to solve the equation as usual.
        • A Harder example: 3(4m-10)+5(2m-12)=20  12m-30+10m-60=20  22m-90=20  22m=110  m=5
      • Some equations may have a fraction in them. To solve this, you must remember that the fraction line means the same as division, therefore to remove it, you multiply the number.
        • For example: X/3 +5=9  X/3=4      X=12  in this example you had to -5 and then X3.
    • Forming Equations:
      • When asked to form an equation you must ensure that all of the terms are always equal to something.
        • For example: a+40+2a+a-20=180
          • This allows you to add or subtract things to both sides of the equation when solving.

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