alleryx + y = 7 আৰু x - y = 3 যোগ কৰিলে কোনটো চলক অপসাৰিত হয়?
Aদুয়োটা
Bএটাও নহয়
Cy
Dx
Answer & Solution
Correct answer: C. y
সমীকৰণ দুটা যোগ কৰিলে +y আৰু -y পদ দুটা বাতিল হয়।
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