i am a 2-digit decimal. my tenths is twice my hundredths. the sum of my digits is 12. what number am i.

0.AB

A = 2B
A + B = 12

3B = 12

You finish it.

36

The ones digits is twice the hundredth digit?

36

To find the number that satisfies the given conditions, we'll break down the information step by step.

Let's represent the two-digit number as 10x + y, where x is the tens digit and y is the ones digit. Since it's a decimal number, x represents the tenths digit, and y represents the hundredths digit.

The problem states that the tenths digit is twice the hundredths digit, so we can write the equation:

x = 2y ... Equation 1

The problem also states that the sum of the digits is 12, which gives us another equation:

x + y = 12 ... Equation 2

Now we can solve this system of equations to find the values of x and y, which will give us the number.

Substituting the value of x from Equation 1 into Equation 2, we get:

2y + y = 12

Combining like terms, we have:

3y = 12

Dividing both sides by 3, we find:

y = 4

Substituting the value of y back into Equation 1, we get:

x = 2(4)

x = 8

Therefore, the tenths digit (x) is 8, and the hundredths digit (y) is 4. Thus, the number is 84.