Question 792745
The tens digit of a two digit number is twice the units digits.If the digits are reversed and results doubled the final results is nine more than the original.What is the number
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let u=units digit
let t=tens digit
t=2u
2(10u+t)=10t+u+9
20u+2t=10t+u+9
20u+4u=20u+u+9
3u=9
u=3
t=2u=6
number:63