Evaluate the following arithmetic expressions:
`129-:3-9xx2+7`

Answer

To evaluate the arithmetic expression `129 ÷ 3 - 9 × 2 + 7`, we will follow the order of operations, which is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Let's break it down step by step:

### Step 1: Division
First, we perform the division:
- \( 129 ÷ 3 = 43 \)

Now, substitute this back into the expression:
- The expression now looks like: \( 43 - 9 × 2 + 7 \)

### Step 2: Multiplication
Next, we perform the multiplication:
- \( 9 × 2 = 18 \)

Now, substitute this back into the expression:
- The expression now looks like: \( 43 - 18 + 7 \)

### Step 3: Subtraction and Addition
Now, we will perform the subtraction and addition from left to right:
1. First, subtract \( 18 \) from \( 43 \):
- \( 43 - 18 = 25 \)

2. Then, add \( 7 \) to \( 25 \):
- \( 25 + 7 = 32 \)

### Final Answer
Thus, the final answer to the expression \( 129 ÷ 3 - 9 × 2 + 7 \) is \( 32 \).

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