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Q.1 एक भाई अपनी बहन से १ वर्ष बड़ा है, यदि दोनो की उम्र का योग २८ वर्ष है, तो बहन की उम्र क्या है?
Mathematics
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4 stepsबहन की उम्र को और भाई की उम्र को मानिए।
प्रश्न के अनुसार, भाई बहन से 4 वर्ष बड़ा है, तो हम लिख सकते हैं:
दोनों की उम्र का योग 28 वर्ष है:
पहली समीकरण () को दूसरी समीकरण में प्रतिस्थापित करें।
समीकरण को सरल करें।
के लिए हल करें।
अतः, बहन की उम्र 12 वर्ष है।
बहन की उम्र:
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