समीकरणों (2x-y=7) और (x+2y=14) का हल क्या है?
What is the solution of (2x-y=7) and (x+2y=14)?
Explanation opens after your attempt
A. \(x=\frac{28}{5},\ y=\frac{21}{5}\)
Concept
Use (y=2x-7) from the first equation. Substitution gives (5x=28), so \(x=\frac{28}{5}\) and \(y=\frac{21}{5}\).
Why this answer is correct
The correct answer is A. \(x=\frac{28}{5},\ y=\frac{21}{5}\). Use (y=2x-7) from the first equation. Substitution gives (5x=28), so \(x=\frac{28}{5}\) and \(y=\frac{21}{5}\).
Exam Tip
पहले समीकरण से (y=2x-7) रखें। दूसरे में रखने पर (5x=28), इसलिए \(x=\frac{28}{5}\) और \(y=\frac{21}{5}\)।
Login to save your score, XP, coins and progress.
