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On solving (9x-4y=52) and (3x+4y=20), what is (y)?समीकरणों (9x-4y=52) और (3x+4y=20) को हल करने पर (y) कितना होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (y=-\frac{1}{2})(y=-\frac{1}{2})
Adding both equations gives (12x=72), so (x=6). The second equation gives (18+4y=20), so (y=\frac{1}{2}), hence the correct listed value is (C).दोनों समीकरण जोड़ने पर (12x=72), इसलिए (x=6)। दूसरे समीकरण से (18+4y=20), इसलिए (y=\frac{1}{2}), इसलिए विकल्पों में सही मान (C) होता।
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