Find the value of :
a + 2b - 5c when a = 2, b = -3 and c = 1

Answer

To find the value of the expression \( a + 2b - 5c \) when \( a = 2 \), \( b = -3 \), and \( c = 1 \), we will follow these steps:

### Step 1: Substitute the values into the expression
The expression we need to evaluate is:
\[ a + 2b - 5c \]
Now, we will substitute the given values:
- \( a = 2 \)
- \( b = -3 \)
- \( c = 1 \)

So, substituting these values gives us:
\[ 2 + 2(-3) - 5(1) \]

### Step 2: Calculate \( 2b \)
Next, we calculate \( 2b \):
\[ 2(-3) = -6 \]
Now, we can rewrite the expression:
\[ 2 - 6 - 5(1) \]

### Step 3: Calculate \( -5c \)
Now, we calculate \( -5c \):
\[ -5(1) = -5 \]
Now, we can rewrite the expression:
\[ 2 - 6 - 5 \]

### Step 4: Combine the terms
Now, we will combine the terms:
\[ 2 - 6 = -4 \]
Then, we subtract 5:
\[ -4 - 5 = -9 \]

### Final Answer
Thus, the value of the expression \( a + 2b - 5c \) is:
\[ \boxed{-9} \]

---