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    y=x-5 rearrange the formulae to make x the subject
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    x=y+5
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    (Original post by Harryacko)
    y=x-5 rearrange the formulae to make x the subject
    Are you a troll??? Even my 4 year old cousin brother can do this!!!
    Well it's x=y+5
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    The topic for this is "rearranging forumulae", this is fairly simple.
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    (Original post by Harryacko)
    y=x-5 rearrange the formulae to make x the subject
    "To make x the subject" means to have an equation with all the terms in x on one side.Currently, y is the subject of the equation.

    To make x the subject, you need to 'move' the -5 from the right hand side of the equation onto the left hand side.

    We do this by adding 5 to both sides. This is because -5 + 5 = 0 and so we will simply be left with: y + 5 = x + 0 which is the same as y+5 = x. This is the right answer, but we usually prefer to write it as x = y+5.

    Now try making x the subject of the following:

    (1) y = x + 2

    (2) y = 2 - x

    (3) 2y + 3 = 2x -1
 
 
 
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Updated: February 7, 2017
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