1.

If 3x + 5y = 9 and 5x + 3y = 7, then what is the value of x + y ? (A) 2 (B) 16 (C) 9 (D) 7

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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