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    d=4+square root of t
    make t the subject

    (Original post by Sammyboy1234)
    d=4+square root of t
    make t the subject
    You want to isolate t - so move 4 across to the other side ( it becomes negative because it has crossed the floor)

    you will then have d minus 4 = square root of t

    put a bracket round minus 4 and square it and do the same to the other side .... et voila!
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