यदि (6x-y=21) और (2x+3y=17), तो सही हल कौन-सा है?
If (6x-y=21) and (2x+3y=17), which is the correct solution?
Explanation opens after your attempt
C. (x=4,\ y=3)
Concept
From the first equation use (y=6x-21). Substituting in the second gives (20x=80), so (x=4,\ y=3).
Why this answer is correct
The correct answer is C. (x=4,\ y=3). From the first equation use (y=6x-21). Substituting in the second gives (20x=80), so (x=4,\ y=3).
Exam Tip
पहले समीकरण से (y=6x-21) रखें। दूसरे में रखने पर (20x=80), इसलिए (x=4,\ y=3)।
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