Decode operator meanings and evaluate: Mapping: “-” means “×”, “x” means “+”, “+” means “÷”, “÷” means “−”. Evaluate: 40 x 12 + 3 - 6 ÷ 60

Introduction / Context: This is a direct operator-mapping exercise. Replace each printed symbol by its assigned meaning, then compute with standard precedence (× and ÷ first, then + and −), left-to-right within each tier.

Given Data / Assumptions:

• “-” → ×, “x” → +, “+” → ÷, “÷” → −
• Expression: 40 x 12 + 3 - 6 ÷ 60
• Use standard precedence rigorously.

Concept / Approach: Translate first, then evaluate. Do not mix old and new meanings during arithmetic.

Step-by-Step Solution: Translate → 40 + 12 ÷ 3 × 6 − 60 Compute ×/÷ left→right: 12 ÷ 3 = 4; then 4 × 6 = 24 Now +/−: 40 + 24 − 60 = 4

Verification / Alternative check: Parenthesized view: 40 + ((12 ÷ 3) × 6) − 60 = 40 + (4 × 6) − 60 = 40 + 24 − 60 = 4.

Why Other Options Are Wrong: They arise from swapping the mapping or from evaluating +/− before finishing ×/÷.

Common Pitfalls: Treating the printed symbols as usual arithmetic signs instead of mapping first; reversing the left-to-right order in chained ×/÷.

Final Answer: 4