allery$2x + y = 7$ और $x + y = 4$ से, $y$ का मान क्या है?
A4
B2
C3
D1
Answer & Solution
Correct answer: D. 1
घटाने पर $x = 3$ मिलता है, और फिर $y = 4 - 3 = 1$ प्राप्त होता है।
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