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The number of solutions of 3x+y = 243 and 243x-y = 3 is (a) 0(b) 1(c) 2(d) infinite |
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Answer» Correct answer is: (b) 1 3x+y = 243 = 35 So x + y =5----------(1) 243x-y = 3 (35)x-y = 31 So 5x -5y =1---------(2) Since : \(\cfrac{a_1}{a_2}\neq\cfrac{b_1}{b_2}\), so unique solution |
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