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(3) x + y = 0 ; 2x - y = 9 |
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Answer» Step-by-step explanation: X+y=0 x=-y therefore, 2x - y= 9 2(-y) -y=9 -2y-y=9 -3y=9 y=9/-3 y= -3so, x+y=0 x-3=0 x= 3 |
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