समीकरणों (2x-y=6) और (x+3y=13) का हल क्या है?
What is the solution of (2x-y=6) and (x+3y=13)?
Explanation opens after your attempt
D. \(x=\frac{31}{7},\ y=\frac{20}{7}\)
Concept
Use (y=2x-6) from the first equation. Substitution gives (7x=31), so \(x=\frac{31}{7},\ y=\frac{20}{7}\).
Why this answer is correct
The correct answer is D. \(x=\frac{31}{7},\ y=\frac{20}{7}\). Use (y=2x-6) from the first equation. Substitution gives (7x=31), so \(x=\frac{31}{7},\ y=\frac{20}{7}\).
Exam Tip
पहले समीकरण से (y=2x-6) रखें। दूसरे में रखने पर (7x=31), इसलिए \(x=\frac{31}{7},\ y=\frac{20}{7}\)।
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