A srudent was said to multiply by 8/17 to a number but he multiplied by 8/17 the result was 225 more then tha real result
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∵ N x 17/8 - N x 8/17 =225
⇒ 225 x N / 136 = 225
∴ N = (225 x 136) / 225 = 136
⇒ 225 x N / 136 = 225
∴ N = (225 x 136) / 225 = 136
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