# Maths

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• Created by: 11btaylo
• Created on: 11-11-15 12:01
• 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.