Question

X +y = 6 dan x-y = 0
tentukan dalam metode subtitusi dan eliminasi!

Answer 1

Metode eliminasi
x+y=6                x+y=6
x-y =0                x-y =0
______ +          _______ -
2x=6                    2y=6
x=3                       y=3

metode substitusi
x+y=6
x-y=0 ----> x=y
x+x=6 -----> x=3, karena x=y maka y=3

Answer 2

eliminasi
x+y = 6
x-y  = 0
_______ +
2x    = 6
x      = 3

x+y=6
x-y =0
______  -
2y  = 6
y    =3

substitusi
x-y=0
x=y

substitusi nilai x
x+y=6
y+y=6
2y=6
y=3

substitusi nilai y
x+y=6
x+x=6
2x=6
x=3