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4x + 3y =0 , 3x +4y =0
4x +3y +5 =0 , 4x +3y -5=0
4x + 3y +20 =0, 4x +3y -20=0
4x +3y +8 =0 ; 4x + 3y -12=0
4x + 3y=0; 4x +3y -20 =0
ANS : 5
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