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If 3x + 5y = 9 and 5x + 3y = 7, then what is the value of x + y ? (A) 2 (B) 16 (C) 9 (D) 7 |
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Answer» (A) 2 Adding the given equations, 3x+ 5y = 9 5x + 3y = 7 8x + 8y = 16 ∴ x + y = 2 .. [Dividing both sides by 8] |
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