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3х – 4y = 7 5x +2y = 3 find the value of 7x+ 5y. |
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Answer» x=1 & y=-1 7x+5y=2 Step-by-step explanation: 3x-4y=7 5x+2y=3-------×2 3x-4y=7 10x+4y=6. On adding 13x=13 x=1 Putting value in equation 3(1)-4y=7 3-4y=7 -4y=4 y=-1 Now, Value of 7x+5y=7(1)+5(-1) 7-5=2 |
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