यदि (4x+7y=53) और (4x-3y=13), तो (x-y) का मान क्या है?
If (4x+7y=53) and (4x-3y=13), what is the value of (x-y)?
Explanation opens after your attempt
A. \(x-y=\frac{9}{4}\)
Concept
Subtracting the equations gives (10y=40), so (y=4). Then \(x=\frac{25}{4}\), hence \(x-y=\frac{9}{4}\).
Why this answer is correct
The correct answer is A. \(x-y=\frac{9}{4}\). Subtracting the equations gives (10y=40), so (y=4). Then \(x=\frac{25}{4}\), hence \(x-y=\frac{9}{4}\).
Exam Tip
दोनों समीकरण घटाने पर (10y=40), इसलिए (y=4)। फिर \(x=\frac{25}{4}\), अतः \(x-y=\frac{9}{4}\)।
Login to save your score, XP, coins and progress.
