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

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hoblosBest ResponseYou've already chosen the best response.2
let 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 ??
 one year ago

littlesharaihBest ResponseYou've already chosen the best response.1
I'm not understanding
 one year ago

hoblosBest ResponseYou've already chosen the best response.2
you dont understand the part that the two digit number = 10b + a ??
 one year ago

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

hoblosBest ResponseYou've already chosen the best response.2
no! 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)
 one year ago

littlesharaihBest ResponseYou've already chosen the best response.1
dw:1344293939890:dw
 one year ago

littlesharaihBest ResponseYou've already chosen the best response.1
is this correct?
 one year ago

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

littlesharaihBest ResponseYou've already chosen the best response.1
therefore my answer is 39
 one year ago

hoblosBest ResponseYou've already chosen the best response.2
yes it is.. good job :)
 one year ago
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