Question 483382
d^2 - 4 (x+2) = d(x-2)
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Get the "x" terms on one side:
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d(x-2)+4(x+2) = d^2
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Factor:
(x+2)(d+4) = d^2
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Solve for "x":
x+2 = d^2/(d+4)
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x = [d^2/(d+4)]-2
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Cheers,
Stan H.