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1] If 5x+7y=17; 7x+5y=19, then find the value of (x-y).A]2 B] 4 C] 1 D] 7 |
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Answer» X-Y=1 Step-by-step explanation: 5x+7y=17----(i) 7x+5y=19----(II) subtracting (i) from (ii) we get 2x-2y=2 dividing WHOLE EQUATION by 2 we get x-y=1 Solved |
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