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i have fopur questions like this but don't undersand them. thanks

Rearrange the formula a=(7/b+1)-4 to make b the subject

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asked by Beth
  1. a=(7/b+1)-4

    a+4 = 7/b + 1

    b(a+4) = 7 + b

    b a + 4b - b = 7

    b (a+3) = 7

    b = 7/(a+3)

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    posted by Damon

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