Sally's age is 12 years plus half her age. How old is she?

Billy is twice as ld as Sally was when billy was as old as Sally is now. And the total ages is 28 how old are they?

Let Sally's age be S.

S = 12 + (S/2)
S/2 = 12
S = 24
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(new question; different age for Sally, S)

Let Billy's age(now) be B; Sally's age (now) = S. Billy is older by B-S years

B + S = 28

B = 2*[S - (B-S)] = 4S -2B
3B -4S = 0
4B + 4S = 112
7B = 112
B = 16
S = 12

When Billy was 12, Sally was 8; he is 16 now. It checks

Nice I am weak in math

Nice it likes questions like mental ability

To find Sally's age, we can use the information given in the first statement.

The statement says Sally's age is 12 years plus half her age. Let's use an algebraic approach to solve it.

Let's assume Sally's age is "x" years.

According to the given statement, we have the equation: x = 12 + (1/2)x.

To solve the equation, we can multiply through by 2 to get rid of the fraction:

2x = 24 + x.

Now, we can subtract "x" from both sides to isolate the "x" term:

2x - x = 24.

Simplifying, we have:

x = 24.

Therefore, Sally is 24 years old.

Now, let's move on to the second question about Billy and Sally's ages.

The statement says that Billy is twice as old as Sally was when Billy was as old as Sally is now. Let's use an algebraic approach to solve it.

Let's assume Sally's age is "x" years.

When Sally was x years old, Billy was the same age. So, we can assume Billy is also "x" years old.

According to the given statement, Billy is currently twice as old as Sally was when Billy was x years old. This means Sally's age at that time was (x - x/2) years.

Now, we're given that the total of their ages is 28:

x + (x - x/2) = 28.

Let's simplify the equation:

2x + (2x - x) = 56.

Simplifying further:

2x + x = 56.

Combining like terms:

3x = 56.

Dividing both sides of the equation by 3:

x = 56/3.

Therefore, Sally is approximately 18.67 years old.

To find Billy's age, we can substitute Sally's age back into the equation:

Billy's age = 2 * (Sally's age when Billy was x years old) = 2 * (x - x/2) = 2 * (18.67 - 18.67/2) = 2 * (18.67 - 9.335) = 2 * 9.335 = 18.67 years old.

Therefore, Billy is also approximately 18.67 years old.