Mathematics
Rpm
22

a two digit number is such that the product of its digits is 35. when 18 is added to the number the digits interchange their places. find the number

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(1) Answers
SunnyDownen706

x * y = 35 y * 10 + x + 18 = x * 10 + y 9 * y - 9 * x + 18 = 0 y = 35 / x 9 * 35 / x - 9 * x  + 18 = 0  -9x² + 18x + 315 = 0 x = 7 y = 5

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