Question

the units digit of two digit number is 3 qnd seven times the sum of the digits is the number iiself. Find the number​

Answer 1

Answer:

$7(t + 3) = 10t + 3 \\ 7t + 21 = 10t + 3 \\ 21 - 3 = 10t - 7t \\ 18 = 3t \\ t = \frac{18}{3} = 6$

we have found that the tens is 6,now put 3 unit to it

So final answer is 63

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