विलोपन विधि से (x+3y=13) और (x-y=1) को घटाने पर कौन-सा समीकरण मिलेगा?
Using elimination, what equation is obtained by subtracting (x-y=1) from (x+3y=13)?
Explanation opens after your attempt
A. (4y=12)
Concept
On subtraction, (x) cancels and (3y-(-y)=4y), so (4y=12). Be careful with negative signs while subtracting.
Why this answer is correct
The correct answer is A. (4y=12). On subtraction, (x) cancels and (3y-(-y)=4y), so (4y=12). Be careful with negative signs while subtracting.
Exam Tip
घटाने पर (x) कटता है और (3y-(-y)=4y), इसलिए (4y=12)। घटाते समय ऋण चिह्न का ध्यान रखें।
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