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3. If 10x + 5y = 15 and 5x + 10y = 45 What is the value of x-y?AJ 6 BJ -6 03 D136 |
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Answer» ONG>ANSWER: -6 Step-by-step explanation: 10x+5y=15 5(2x+y)=15 2x+y=3‐---1 5x+10y=45 5(x+2y)=45 x+2y=9‐--------2 1-2 x-y=3-9 x-y=-6 |
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