Metode eliminasi x+y=3 Dan x+2y=-1

x + y   = 3

x + 2y = -1   _

0 + y = 4

4 karena 3 – (-1)

x+y=3 x 2= 2x+2y=6

x+2y = -1 x 1 =x+2y= -1

2x= 7

x= 7/2