If a is a whole number such that `a+a=a`, then `a=`?

Options

A. 1
B. 0
C. 3
D. none of these

Answer

To solve the equation \( a + a = a \), we will follow these steps:

### Step 1: Understand the equation
The equation given is \( a + a = a \). This means that when we add \( a \) to itself, we should get \( a \) back.

### Step 2: Simplify the equation
We can simplify the left side of the equation:
\[ a + a = 2a \]
So, we can rewrite the equation as:
\[ 2a = a \]

### Step 3: Rearrange the equation
Now, we can rearrange the equation to isolate \( a \):
\[ 2a - a = 0 \]
This simplifies to:
\[ a = 0 \]

### Step 4: Verify the solution
Now, we should verify if \( a = 0 \) satisfies the original equation:
\[ 0 + 0 = 0 \]
This is true, so our solution is valid.

### Conclusion
Thus, the value of \( a \) is:
\[ \boxed{0} \]

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