Question

Tent.himpunan penyelesaian sistem persamaan dgn metode subsitusi.
1.x + 4y - 6 = 0
2x - y - 3 = 0

Answer 1

X+4y-6=0
x = 6 -4y
subs ke pers 2
2x - y - 3 = 0
2 ( 6-4y ) - y - 3 = 0
12 - 8y - y -3 = 0
- 8y - y + 12 - 3 = 0
-9y + 9 = 0
-9y = -9
y = 1
subs ke pers 1
x + 4y - 6 = 0
x + 4(1) - 6 = 0
x + 4 - 6 = 0
x -2 =0
x = 2
x=2 dan y = 1
maaf kalau salah