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<div align="center"><br /> <table style="color: #003300; border: 4px solid #003300; float: none; text-align: left; vertical-align: top; background-image: none; background-color: #ffffcc; width: 500px; height: 165px;" border="4" frame="void" rules="none"> <tbody> <tr align="center"> <td style="background-color: #003300; background-image: none; color: #ffcc00; border-color: #003300; text-align: center; vertical-align: top; border-style: none;" valign="top" width="NaNpx"><span style="font-size: large; color: #ffff99;" data-mce-mark="1">Reducció</span><strong><br /></strong></td> </tr> <tr> <td valign="top" width="NaNpx"> <p><strong><span style="font-size: small; color: #003300;">En el sistema lineal «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfenced mathcolor=¨#00007F¨ open=¨{¨ close=¨}¨»«mtable»«mtr»«mtd»«mn mathvariant=¨bold¨ mathcolor=¨#FF0000¨»4«/mn»«mi mathvariant=¨bold-italic¨»x«/mi»«mo mathvariant=¨bold¨»-«/mo»«mn mathvariant=¨bold¨»10«/mn»«mi mathvariant=¨bold-italic¨»y«/mi»«mo mathvariant=¨bold¨»=«/mo»«mn mathvariant=¨bold¨»6«/mn»«/mtd»«/mtr»«mtr»«mtd»«mo mathvariant=¨bold¨ mathcolor=¨#FF0000¨»-«/mo»«mn mathvariant=¨bold¨ mathcolor=¨#FF0000¨»6«/mn»«mi mathvariant=¨bold-italic¨»x«/mi»«mo mathvariant=¨bold¨»+«/mo»«mn mathvariant=¨bold¨»5«/mn»«mi mathvariant=¨bold-italic¨»y«/mi»«mo mathvariant=¨bold¨»=«/mo»«mo mathvariant=¨bold¨»-«/mo»«mn mathvariant=¨bold¨»19«/mn»«/mtd»«/mtr»«/mtable»«/mfenced»«/math»</span><br /><br /><span style="font-size: small; color: #003300;">Elimino x: calculo el mcm de <span style="color: #ff0000;">4</span> i <span style="color: #ff0000;">-6</span> = <span style="color: #008000;">12</span> i igualo els coeficients, </span></strong></p> <p><strong><span style="font-size: small; color: #003300;">multiplicant la 1a per 3(12:4) i la 2a per -2(12:-6)</span></strong></p> <p style="text-align: center;"><strong><span style="font-size: small; color: #003300;" data-mce-mark="1">«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfenced mathcolor=¨#00007F¨ open=¨{¨ close=¨}¨»«mtable»«mtr»«mtd»«mn mathvariant=¨bold¨ mathcolor=¨#007F00¨»12«/mn»«mi mathvariant=¨bold¨»x«/mi»«mo mathvariant=¨bold¨»-«/mo»«mn mathvariant=¨bold¨»30«/mn»«mi mathvariant=¨bold¨»y«/mi»«mo mathvariant=¨bold¨»=«/mo»«mn mathvariant=¨bold¨»18«/mn»«/mtd»«/mtr»«mtr»«mtd»«mn mathvariant=¨bold¨ mathcolor=¨#007F00¨»12«/mn»«mi mathvariant=¨bold¨»x«/mi»«mo mathvariant=¨bold¨»-«/mo»«mn mathvariant=¨bold¨»10«/mn»«mi mathvariant=¨bold¨»y«/mi»«mo mathvariant=¨bold¨»=«/mo»«mn mathvariant=¨bold¨»38«/mn»«/mtd»«/mtr»«/mtable»«/mfenced»«mo»§#160;«/mo»«/math»</span></strong></p> <p style="text-align: justify;"><span style="font-size: small; color: #003300;"><strong>REST0 la 2a de la 1a i ens queda: -20y = -20, o sigui y = 1. </strong></span></p> <p style="text-align: justify;"><span style="font-size: small; color: #003300;"><strong>Elimino la y per trobar la x, o substitueixo.</strong></span></p> <p><span style="color: #003300;"><strong style="line-height: 1.4;"><span style="font-size: small;">Solució: (4,1) </span></strong></span></p> </td> </tr> </tbody> </table> </div>
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