Mathematics · Mathematical Operations
यदि '+' और '-' को आपस में बदल दिया जाए, तथा '×' और '÷' को आपस में बदल दिया जाए, तो निम्नलिखित समीकरण में प्रश्न चिह्न (?) के स्थान पर क्या आएगा? 12 - 15 ÷ 7 × 5 + 9 = ?
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