Posted by Lucy on Tuesday, January 4, 2011 at 8:29pm.
1) the sum of the digits of a two digit number is 9. The value of the number is 12 times the tens digit. Find the number.
2) the sum of the digits of a two digit number is 12. If 15 is added to the number the result is 6times the units digit. Find the number.
Please help!!
Thanks (:

Algebra math.  Reiny, Tuesday, January 4, 2011 at 8:59pm
let the unit digit by x
let the tens digit be y
so x+y=9, both x and y being whole numbers
value of number = 10y+x
given: 10y+x = 12y
or x = 2y
back in the first:
x+y=9
2y+y=9
y=3, and thus x = 6
the number is 36
let's see you do the second question in the same way.

Algebra math.  Lucy, Wednesday, January 5, 2011 at 12:36am
Thanks ! This really helped (:
Answer This Question
Related Questions
 Math  Algebra  What is the linear equation that will represent the second ...
 algebra  A number consists of two digits. The sum of twice the tens digit an 5 ...
 word problem  the different between the digit of a two digit number is 1, the ...
 word problem  the different between the digit of a two digit number is 1, the ...
 maths  Find the sum of all 3digit positive numbers N that satisfy the ...
 Exploring mathematics elementary algebra  The tens digit of a twodigit number ...
 exploring mathematics elementary algebra  the sum of the digits of a twodigit ...
 math  This is an SAT question of the day that I can't understand. The sum of ...
 math (pLZ HELP ASAP)  The unitsâ€™ digit of a twodigit number is 7 more than the...
 tres ninos school  exploring mathematics elementary algebra....the sum of the ...
More Related Questions