What sum of money lent for 3 years at 4persentage per year Wii amount to Rs392?
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9x? + 5x = 4 9x2 + 5x 4 = 0 9x + 9x 4x 4 = 0 9x(x + 1) 4(x + 1) = 0 (x + 1)(9x 4) = 0 x = -1 and x = 4 ÷9
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