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sqrt(4x+7) -4 = sqrt(4x-1)

squared : (sqrt(4x+7) -4)2 = 4x-1

(4x+7) - 2x4xsqrt(4x+7) +16 = 4x-1

-8xsqrt(4x+7) = -24

sqrt(4x+7) = -24/-8 = 3

squared : 4x+7 = 32 = 9

4x = 9-7 = 2 then x=1/2

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