If 4x − y = 11 and 2x + 3y = 23, what is the value of y using substitution?यदि 4x − y = 11 और 2x + 3y = 23, तो प्रतिस्थापन विधि से y का मान क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 55
From 4x − y = 11, we get y = 4x − 11. Substituting this into the second equation gives 2x + 3(4x − 11) = 23, so 14x = 56 and x = 4. Therefore, y = 4(4) − 11 = 5.4x − y = 11 से y = 4x − 11 मिलता है। इसे दूसरे समीकरण में रखने पर 2x + 3(4x − 11) = 23, इसलिए 14x = 56 और x = 4। अतः y = 4(4) − 11 = 5।
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