समीकरण (x+y=15) और (x=2y) का हल क्या है?
What is the solution of (x+y=15) and (x=2y)?
Explanation opens after your attempt
B. ( (10,5) )
Concept
Putting (x=2y) gives (3y=15), so (y=5) and (x=10). Substitution is easiest when a ratio relation is given.
Why this answer is correct
The correct answer is B. ( (10,5) ). Putting (x=2y) gives (3y=15), so (y=5) and (x=10). Substitution is easiest when a ratio relation is given.
Exam Tip
(x=2y) रखने पर (3y=15), इसलिए (y=5) और (x=10)। अनुपात वाले संबंध में प्रतिस्थापन सबसे आसान रहता है।
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