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2015-02-26T15:17:01+08:00

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I think the original number is 6. 6 + 6 is 12 .. Thanks!
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2015-02-27T09:12:10+08:00

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Okay:::::::::::::::
let x = the tens digit
let y = the unit digit
and x+y=12
now check this out!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
diba 10x+y=the original number
for example:the no. is 22          {{{{10x+y}}}}============10(2)+2=22
kuha na?another example:the no. is 45 {{{{10x+y}}}}=======10(4)+5=45
yan seguradong nakuha mo na................................................................


ngayon may sinabi diyan na ##digits are reversed##
pag-sinabing reversed ganito yan =====ang oder ng number ay binaliktad,meaning ang unit sa orig. naging tens sa pangalawang no. at ang tens naman sa orig. naging unit sa pangalawang no.

THEREFORE::::::
the second number is 10y+x example: 45 sa orig. magiging 54 sa second no.

at ngayon:::ayon sa problem
10y+x=2(10x+y) + 15 batay sa #reversed digit is 15 more than twice the original number#
at alam natin na x+Y=12@@@@@@@@@@@@@@x=12-y or y=12-x

e subtitute natin ang y=12-x sa equation na 10y+x=2(10x+y)+15 or 10y+x=20x+2y + 15.......................................................
10(12-x)+x=20x+2(12-x)+15........simplify natin 120-10x+x=20x+24-2x+15 at e hiwalay ang variables sa number.......................27x=81  therfore x=3
.....x+y=12.....kaya 3+y=12...y=9

x=3
y=9
THEREFORE THE ORIGINAL NUMBER IS ###39###

LETS CHECK:
x+y=12.......3+9=12
10y+x=20x+2y+15
10(9)+(3)=20(3)+2(9)+15
93=93 check
orig. no. #39#
reversed no. #93#



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