SISTEMA de ECUACIONES

SISTEMA de ECUACIONES

1. *x + y = 55* 2x + 3y = 140

   • MÉTODOS
     • SUSTITUCIÓN
       • ***x = 55 - y*** 2(55 - y) + 3y = 140 110 - 2y + 3y =140 *y = 140 - 110 = 30* ****x = 55 - y**** x = 55 - 30 = 25
     • IGUALACIÓN
       • *****x = 55 - y***** *x = (140 - 3y) / 2* *55 - y = (140 -3y) / 2* **110-2y=140-3y** **3y-2y = 140-110** ******y = 30******* x = 55-30 = 25
     • REDUCCIÓN
       • **-2[x + y = 55]** *-2x - 2y = -110* *2x + 3y = 140* ***/*+*y = 30**** x=55-y=55-30=25
     • GRÁFICO
       • 3x + 2y = 6 y - 2x = 3
         • x=0 y=3

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