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littlesharaih
 3 years ago
The sum of the digits of a twodigit number is 12. If the units digit is 3 times the tens digit, find the number.
littlesharaih
 3 years ago
The sum of the digits of a twodigit number is 12. If the units digit is 3 times the tens digit, find the number.

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hoblos
 3 years ago
Best ResponseYou've already chosen the best response.2let a be the units digit and b be the tens digit the number = 10b +a to find a and b we must solve the system a+b =12 a= 3b can you solve it ??

littlesharaih
 3 years ago
Best ResponseYou've already chosen the best response.1I'm not understanding

hoblos
 3 years ago
Best ResponseYou've already chosen the best response.2you dont understand the part that the two digit number = 10b + a ??

littlesharaih
 3 years ago
Best ResponseYou've already chosen the best response.1I don't understand how we start at 10b+a and then we go to a+b=12

hoblos
 3 years ago
Best ResponseYou've already chosen the best response.2no! these two parts are not related directly.. 10a+b is the general form of any two digits number but a+b =12 is concluded from the given ( The sum of the digits of a twodigit number is 12)

littlesharaih
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1344293939890:dw

hoblos
 3 years ago
Best ResponseYou've already chosen the best response.2b=3 is correct but then you must replace (b=3) in the equation a+b=12 to get a and then add 10b +a

littlesharaih
 3 years ago
Best ResponseYou've already chosen the best response.1therefore my answer is 39
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