allery2x + y = 7 మరియు x + y = 4 నుండి, y విలువ
A4
B2
C3
D1
Answer & Solution
Correct answer: D. 1
వ్యవకలనం చేయగా x = 3 వస్తుంది, ఆపై y = 4 - 3 = 1 అవుతుంది.
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