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If 4x+y=7 and x+4y=-2 then the value of x-y= |
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Answer» -STEP explanation:4x+y=7 ( 1)x+4y=-2 (2)ADDING EQUATIONS (1) and (2) 4x+y=7+ x+4y=-2------------------ 5x+5y=55(x+y)=5x+y=1 |
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