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    hi,
    i need some help on rearranging formulae. could someone please help.

    1. w=x²+y make x the subject of the formula

    and
    2. r-3=pi(t-2r) make r the subject of the formula

    please could you show your working out

    NOTE: pi represents the symbol

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    hi,
    im doing some rearranging formulae and im stuck on two questions

    1. 3x+2y=8y-3 make x the subject of the formula but simplify as much as possible.

    2. u=t/3 +5 make t the subject of the formulae

    please could you show your working

    thank you
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    no, you show your working! (and you posted this in the wrong section by the way).

    have you done anything so far?
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    higher tier :s

    i swear we did this sort of stuff in year 5 or 6.

    and show us what you've done
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    Just think of the equals sign as a pair of scales that you have to keep balanced. Whatever you do to one side you have to do the same to the other to keep them balanced e.g. if you add/subtract 5 to one side, you must do the same to the other side.
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    (Original post by joshy123)
    hi,
    im doing some rearranging formulae and im stuck on two questions

    1. 3x+2y=8y-3 make x the subject of the formula but simplify as much as possible.

    2. u=t/3 +5 make t the subject of the formulae

    please could you show your working

    thank you
    x= 2y-1

    t=3u-15
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    (Original post by joshy123)
    hi,
    im doing some rearranging formulae and im stuck on two questions

    1. 3x+2y=8y-3 make x the subject of the formula but simplify as much as possible.

    2. u=t/3 +5 make t the subject of the formulae

    please could you show your working

    thank you
    1. Begin by keeping the 3x on the Left hand side and taking 2y away from both sides
    3x = 8y - 2y - 3
    and then you can subtract the 2y from the 8y
    3x = 6y - 3
    and then you divide by 3 to get x on it's own as you want to make x the subject of the formula so you get
    x = 2y - 1

    2. First off all multiply by 3 to get t on its own so you get
    3u = t + (3 x 5)
    3u = t + 15
    As you want to make t the subject then you take away 15 from both sides to get
    3u - 15= t
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    (Original post by joshy123)
    hi,
    i need some help on rearranging formulae. could someone please help.

    1. w=x²+y make x the subject of the formula

    and
    2. r-3=pi(t-2r) make r the subject of the formula

    please could you show your working out

    NOTE: pi represents the symbol

    for question one you have to -y on both sides, so that is w-y=x²
    then to get x yuh will have to square root w-y
 
 
 
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