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Two lines intersect at ((-4,1)) on a graph. Which pair of equations is correct?एक ग्राफ में दो रेखाएं ((-4,1)) पर प्रतिच्छेद करती हैं। कौन सा समीकरण युग्म सही है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (x+y=-3), (2x-y=-9)(x+y=-3), (2x-y=-9)
Substituting ((-4,1)) makes (x+y=-3) and (2x-y=-9) both true. Substituting the intersection point in both equations is the fastest check.((-4,1)) रखने पर (x+y=-3) और (2x-y=-9) दोनों सही हैं। प्रतिच्छेद बिंदु को दोनों समीकरणों में रखना सबसे तेज जांच है।
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