a two digit number is 4 times the sum of its digit and twice the product of the digits find the numbers
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lets say that in units place digit be y and in tens place digit be x so the number is 10x+y hence 10x+y = 4(x+y) so 6x=3y then 2x=y so 10x+y = 2xy hence 6y=y^2 so y can be six only so the number is 36
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