Tentukan eliminasi (4x + 3y = 30 (x + y = 9

4x + 3y = 30                      →  4x + 3y = 30
  x +  y  = 9      dikalikan 4 →  4x + 4y = 36
                                               ----------------- -
                                                       - y = - 6
                                                         y = 6
x + y = 9
x + 6 = 9
      x = 9 - 6
      x = 3

                                           

{4x+3y=30 I* 1 = 4x+3y=30
{x+y=9 l* 4= 4x+4y=36
___________-
-1y= -6
y=-6/-1
y=6


{4x+3y=30 I*1=4x+3y=30
{x+y=9 l* 3= 3x+3y=27
_________________-
1x=3
x=3/1
x=3